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#include<stdio.h>
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#include<stdlib.h>
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#include<string.h>
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#include<conio.h>
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#define MAX 2000
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struct Student
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{
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int num; //学号
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char name[8]; //姓名
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char sex; //性别
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int mark[4]; //三门课成绩，最后为平均成绩
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};
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int get_menu_choice() ;//接受菜单选择
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void menu() ;//菜单响应
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void main_menu(); //显示菜单
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void Sort_menu();//排序菜单
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int all; //总人数
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char password[20];//密码
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struct Student student[MAX];
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void Init(); //初始化,文件不存在，则建立，同时记录下文件中的记录数
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FILE *file_operate(const char *mode);//文件操作
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void Delete(FILE *fp); //删除记录
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void Alter(FILE *fp); //修改记录信息
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void Show(); //显示打印所有的信息
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void Save(); //备份信息到文件
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void Find(); //查找记录的函数
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void Input(FILE *fp); //向管理系统中增加记录
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int Inputoneperson(int i); //向数组增加一条记录
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void set_psw(); //设置密码
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int key_check(); //密码验证
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void exchange(int i,int j);//交换两个人的所有信息
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void PrintTitle(); //打印头信息
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void clear(); //清屏
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void Show_student(int i); //显示打印一个人的信息
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int CheckNumber(int num_temp); //检查学号是否存在，存在返回序号，不存在返回-1
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void Inputfile(int i,FILE *fp); //把下标为i 的记录写入文件
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void Readfile(int i,FILE *fp); //读一条记录从文件
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int Sort_menu_choice();//选择是按学号还是成绩排序
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void Sort_save();//排序后数据写入文件
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void Sort_num();//选择是按学号排序
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void Sort_mark();//选择是按成绩排序
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main() //主函数
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{
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printf("\n");
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printf(" |**************************************************************************|\n");
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printf(" | |\n");
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printf(" | |\n");
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printf(" | |\n");
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printf(" | 欢迎使用学生成绩管理系统 |\n");
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printf(" | |\n");
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printf(" | |\n");
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printf(" | |\n");
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printf(" |**************************************************************************|\n");
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printf("\n");
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if(key_check())
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{
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Init();
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clear();
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menu();
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}
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}
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int get_menu_choice()//接受菜单选择
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{
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int menu_ch; //菜单选项
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do
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{
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printf("Select the choice:");
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scanf("%d",&menu_ch);
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if((menu_ch<0)||(menu_ch>9))
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printf("error!");
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}
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while((menu_ch<0)||(menu_ch>9));
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return(menu_ch);
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}
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void main_menu() //主菜单
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{
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printf("\n");
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printf(" 欢迎使用学生成绩管理系统 \n");
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printf(" ***************************************************************\n");
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printf(" || 0.退出系统 | 1.查询信息 ||\n");
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printf(" || 2.添加信息 | 3 显示信息 ||\n");
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printf(" || 4.删除信息 | 5.修改信息 ||\n");
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printf(" || 6.备份信息 | 7.设置密码 ||\n");
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printf(" || 8.数据排序 ||\n");
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printf(" ***************************************************************\n");
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}
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void clear()//清屏
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{
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system("pause");
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system("cls");
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}
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void menu() //菜单响应
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{
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while(1)
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{
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main_menu();
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switch(get_menu_choice())
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{
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case 1:Find();clear();
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break;
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case 2:Input(file_operate("ab"));clear();
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break;
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case 3:Show();clear();
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break;
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case 4:Delete(file_operate("wb"));clear();
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break;
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case 5:Alter(file_operate("wb"));clear();
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break;
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case 6:Save();clear();
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break;
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case 7:set_psw();clear();
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break;
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case 8:Sort_menu();
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break;
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case 0:system("cls");
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printf("\n");
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printf("\n");
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printf("\n");
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printf(" ||**************************************||\n");
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printf(" ||**************************************||\n");
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printf(" || ||\n");
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printf(" || ||\n");
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printf(" || 感谢使用！ || \n");
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printf(" || ||\n");
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printf(" || ||\n");
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printf(" ||**************************************||\n");
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printf(" ||**************************************||\n");
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exit(0);
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}
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}
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}
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void Show()//显示打印所有的信息
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{
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int i;
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printf("有%d个记录:\n",all);
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PrintTitle();
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for(i=0;i<all;i++)
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Show_student(i);
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}
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void Show_student(int i) //显示打印一个人的信息
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{
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printf(" %8d %8s %1c %3d %3d %3d %3d \n",student[i].num,student[i].name,student[i].sex,student[i].mark[0],student[i].mark[1],student[i].mark[2],student[i].mark[3]);
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}
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void PrintTitle()//打印头信息
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{
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printf("-----------------------------------------------------------------\n");
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printf(" 学号 姓名 性别 语文 数学 英语 平均成绩 \n");
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printf("-----------------------------------------------------------------\n");
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}
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void Init() //初始化,文件不存在，则建立，同时记录下文件中的记录数
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{
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int i;
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FILE *fp;
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all=0;
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if((fp=fopen("student.txt","rb"))==NULL)
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{
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fp=fopen("student.txt","ab");
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clear();
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menu();
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}
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else
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{
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for(i=0;feof(fp)==0;i++)
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Readfile(i,fp);
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}
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all=i-1;
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fclose(fp);
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}
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void Find()//查找记录的函数
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{
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int i,num_temp;
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FILE *fp;
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fp=file_operate("rb");
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for(i=0;feof(fp)==0;i++)
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Readfile(i,fp);
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all=i-1;
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fclose(fp);
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printf("Input the number that someone you want to find:(如10141303)");
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scanf("%d",&num_temp);
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i=CheckNumber(num_temp);
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if(i>=0)
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{
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PrintTitle();
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Show_student(i);
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}
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else
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{
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printf("numbody is the number:%d\n",num_temp);
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}
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}
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void Readfile(int i,FILE *fp)//从文件中读记录
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{
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int j;
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fscanf(fp,"%8d",&student[i].num);
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fscanf(fp,"%8s ",&student[i].name);
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fscanf(fp,"%1c",&student[i].sex);
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for(j=0;j<4;j++)
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fscanf(fp,"%3d",&student[i].mark[j]);
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}
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int CheckNumber(int num_temp)//检查学号是否存在，存在返回序号，不存在返回-1
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{
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int i,result;
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for(i=0;i<all;i++)
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{
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if(student[i].num==num_temp)
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{
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result=1;
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break;
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}
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}
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if(result==1)
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return i;
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else
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return -1;
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}
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int Inputoneperson(int i)//向数组增加一条记录
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{
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int j,sum=0;
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int num_temp;
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do
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{
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printf("输入学号:");
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scanf("%d",&num_temp);
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if(num_temp>999999999)
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printf("error!");
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}
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while(num_temp>99999999);
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if(CheckNumber(num_temp)>0)
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{
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printf("Number repeatly!\n");
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return 0;
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}
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else
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{
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student[i].num=num_temp;
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printf("Input name（lessthan 20 numbers）：");
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scanf("%s",&student[i].name);
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printf("Sex(M/W):");
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scanf("%s",&student[i].sex);
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printf("\n 语文\t 数学\t 英语\n");
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for(j=0;j<3;j++)
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{
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scanf("%d",&student[i].mark[j]);
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sum=sum+student[i].mark[j];
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}
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student[i].mark[3]=sum/3;
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PrintTitle();
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Show_student(i);
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return 1;
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}
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}
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void Input(FILE *fp)//向管理系统中增加记录
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{
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int i;
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i=all;
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if(Inputoneperson(i))
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{
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all++;
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Inputfile(i,fp);
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}
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fclose(fp);
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}
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void Inputfile(int i,FILE *fp) //把下标为i 的记录写入文件
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{
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int j;
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fprintf(fp,"%8d",student[i].num);
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fprintf(fp,"%8s ",student[i].name);
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fprintf(fp,"%1c ",student[i].sex);
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for(j=0;j<4;j++)
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fprintf(fp,"%3d ",student[i].mark[j]);
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}
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void exchange(int i,int j)//交换两个人的所有信息
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{
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int k;
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int num_temp,mark_temp;
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char name_temp[20],sex_temp;
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num_temp=student[i].num;
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student[i].num=student[j].num;
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student[j].num=num_temp;
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for(k=0;k<4;k++)
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{
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mark_temp=student[i].mark[k];
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student[i].mark[k]=student[j].mark[k];
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student[j].mark[k]=mark_temp;
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}
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strcpy(name_temp,student[i].name);
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strcpy(student[i].name,student[j].name);
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strcpy(student[j].name,name_temp);
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sex_temp=student[i].sex;
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student[i].sex=student[j].sex;
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student[j].sex=sex_temp;
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}
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FILE *file_operate(const char *mode)//文件操作
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{
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char choice;
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FILE *fp;
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do
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{
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fflush(stdin);
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if((fp=fopen("student.txt",mode))==NULL)
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{
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puts("Fail to open the file!");
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puts("Try again!(Y/N)?");
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scanf("%c",&choice);
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}
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}
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while(choice=='y'||choice=='Y');
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if(choice=='n'||choice=='N')
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exit(1);
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return(fp);
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}
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void Save()//备份信息到文件
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{
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int i;
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char filename[10],ch;
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FILE *fp;
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printf("Name the new file：(less than ten bits)");
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scanf("%s",filename);
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if((fp=fopen(filename,"wb"))==NULL)
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{
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printf("Fail to build the file!\n");
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exit(0);
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}
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ch=getchar();
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for(i=0;i<all;i++)
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Inputfile(i,fp);
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Show();
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fclose(fp);
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}
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void Delete(FILE *fp)//删除记录
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{
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int i,j,k,num_temp,choice2,t=0;
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char str[5];
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printf("make sure you will delete it(Y/N)");
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gets(str);
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if(str[0]!='N'&&str[0]!='n');
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t=1;
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if(t==1)
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{
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printf("Inpute the number someone you needed:(如10141301)");
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scanf("%d",&num_temp);
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i=CheckNumber(num_temp);
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if(i>=0)
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{
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PrintTitle();
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Show_student(i);
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printf("Sure to delete the person?(1,Y/2,N)");
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scanf("%d",&choice2);
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if(choice2==1)
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{
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for(j=i;j<all;j++)
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{
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strcpy(student[j].name,student[j+1].name);
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student[j].sex=student[j+1].sex;
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student[j].num=student[j+1].num;
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for(k=0;k<4;k++)
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{
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student[j].mark[k]=student[j+1].mark[k];
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}
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}
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all--;
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for(k=0;k<all;k++)
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Inputfile(k,fp);
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}
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}
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}
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else
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printf("numbody is the number:%d\n",num_temp);
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}
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void Alter(FILE *fp)//修改记录信息
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{
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int i,j,num_temp,sum=0,t;
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char str[5];
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printf("make sure you will alter it(Y/N)");
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gets(str);
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if(str[0]!='N'&&str[0]!='n')
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t=1;
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if(t==1)
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{
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printf("Inpute the number somesoe you want to alter:(如10141301)");
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scanf("%d",&num_temp);
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i=CheckNumber(num_temp);
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if(i>=0)
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{
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student[i].num=num_temp;
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printf("Input name（lessthan 20 numbers）：");
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scanf("%s",&student[i].name);
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printf("Sex(M/W):");
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scanf("%s",&student[i].sex);
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printf("\n 语文\t 数学\t 英语\n");
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for(j=0;j<3;j++)
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{
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scanf("%d",&student[i].mark[j]);
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sum=sum+student[i].mark[j];
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}
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student[i].mark[3]=sum/3;
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PrintTitle();
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Show_student(i);
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for(j=0;j<all;j++)
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Inputfile(j,fp);
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}
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}
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else
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printf("numbody is the number:%d\n",num_temp);
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}
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int Sort_menu_choice()//选择是按学号还是成绩排序
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{
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int choice;
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do
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{
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printf("输入排序方式(1 按学号 2 按平均成绩)： ");
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scanf("%d",&choice);
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if((choice<0)||(choice>2))
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printf("error!");
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}
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while((choice<0)||(choice>2));
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return(choice);
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}
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void Sort_num()//选择是按学号排序
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{
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int i,j;
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for(i=0;i<all-1;i++)
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{
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for(j=i+1;j<all;j++)
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{
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if(student[i].num>student[j].num)
|
|
|
exchange(i,j);
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
void Sort_mark()//选择是按成绩排序
|
|
|
{
|
|
|
int i,j;
|
|
|
for(i=0;i<all-1;i++)
|
|
|
{
|
|
|
for(j=i+1;j<all;j++)
|
|
|
{
|
|
|
if(student[i].mark[3]<student[j].mark[3])
|
|
|
exchange(i,j);
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
void Sort_menu()//排序菜单
|
|
|
{
|
|
|
switch(Sort_menu_choice())
|
|
|
{
|
|
|
case 1:Sort_num();
|
|
|
Sort_save();
|
|
|
clear();
|
|
|
break;
|
|
|
case 2:Sort_mark();
|
|
|
Sort_save();
|
|
|
clear();
|
|
|
break;
|
|
|
}
|
|
|
}
|
|
|
void Sort_save()//排序后数据写入文件
|
|
|
{
|
|
|
int i;
|
|
|
FILE *fp;
|
|
|
if((fp=fopen("student.txt","wb"))==NULL)
|
|
|
{
|
|
|
printf("Fail to save the file!\n");
|
|
|
exit(0);
|
|
|
}
|
|
|
for(i=0;i<all;i++)
|
|
|
Inputfile(i,fp);
|
|
|
Show();
|
|
|
fclose(fp);
|
|
|
}
|
|
|
|
|
|
|
|
|
void set_psw()//设置密码
|
|
|
{
|
|
|
char key_set[20],key_check[20],c;
|
|
|
unsigned int i;
|
|
|
FILE *fp;
|
|
|
do
|
|
|
{ printf("You must set password first!\n");
|
|
|
printf("Enter password:(lessthan 12 numbers and key'.'for end)\n");
|
|
|
for(i=0;(c=getch())!=' ';i++)
|
|
|
{
|
|
|
putchar('*');
|
|
|
key_set[i]=c;
|
|
|
}
|
|
|
key_set[i]='\0';
|
|
|
printf("\n------------\n");
|
|
|
printf("conform password:");
|
|
|
for(i=0;(c=getch())!=' ';i++)
|
|
|
{
|
|
|
putchar('*');
|
|
|
key_check[i]=c;
|
|
|
}
|
|
|
key_check[i]='\0';
|
|
|
printf("\n------------\n");
|
|
|
if(strcmp(key_set,key_check)==0)
|
|
|
{printf("Set password success!");
|
|
|
strcpy(password,key_set);
|
|
|
}
|
|
|
else
|
|
|
printf("error!\n");
|
|
|
}
|
|
|
while(strcmp(key_set,key_check)!=0);
|
|
|
clear();
|
|
|
fp=fopen("password.txt","wb");
|
|
|
fprintf(fp,"%s",password);
|
|
|
fclose(fp);
|
|
|
}
|
|
|
|
|
|
|
|
|
int key_check()//密码验证
|
|
|
{
|
|
|
unsigned int i=1,j=1;
|
|
|
FILE *fp;
|
|
|
char pword[20],c;
|
|
|
if((fp=fopen("password.txt","rb"))==NULL)
|
|
|
{
|
|
|
fp=fopen("password.txt","a");
|
|
|
set_psw();
|
|
|
}
|
|
|
fscanf(fp,"%s",password);
|
|
|
fclose(fp);
|
|
|
do
|
|
|
{
|
|
|
printf("\nInput password：key' 'for end(%d/three times)",j);
|
|
|
for(j=0;(c=getch())!=' ';j++)
|
|
|
{
|
|
|
putchar('*');
|
|
|
pword[j]=c;
|
|
|
}
|
|
|
pword[j]='\0';
|
|
|
i++;
|
|
|
}
|
|
|
while(strcmp(pword,password)!=0&&i<=3);
|
|
|
if(i<=3)
|
|
|
return 1;
|
|
|
else
|
|
|
{
|
|
|
printf("You have tryed for three times,fail to open the file!\n");
|
|
|
return 0;
|
|
|
}
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
