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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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#include<dos.h>
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#define LEN sizeof(struct student)
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#define FORMAT "\t%s\t%s\t\t%d\n" //宏定义输出格式
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#define DATA peo[i].name,peo[i].num,peo[i].score //宏定义结构体（方便输出）
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struct student
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{
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char name[100];
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char num[100];
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int score;
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};
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struct student peo[100];
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void addman();
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void queryman();
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void delman();
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void update();
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void outputman();
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void menu();
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void menu()//菜单模块
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{
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system("cls");
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printf("\n\t\t*********C语言成绩记录簿*********\n");
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printf("\t\t┌-------------------------------┐\n");
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printf("\t\t│ 1.添加学生信息 │\n");
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printf("\t\t│ 2.查询学生信息 │\n");
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printf("\t\t│ 3.删除学生信息 │\n");
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printf("\t\t│ 4.修改学生信息 │\n");
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printf("\t\t│ 5.分段输出学生信息 │\n");
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printf("\t\t│ 0.退出 │\n");
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printf("\t\t└-------------------------------┘\n");
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printf("\t\t请您选择功能(0-5):");
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}
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void tou() //列表头
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{ system("cls");
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printf("\n");
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printf("**************学生信息列表*********************\n\n");
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printf("\t姓名\t 学号\t C语言成绩\n");
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}
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void wei() //列表尾
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{
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printf("\n**********************************************\n\n");
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}
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int main ()
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{
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int n;
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menu();
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scanf("%d",&n);
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while(n)
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{
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switch(n)
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{
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case 1:
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addman();
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system("pause");
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break;
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case 2:
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queryman();
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system("pause");
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break;
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case 3:
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delman();
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system("pause");
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break;
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case 4:
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update();
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system("pause");
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break;
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case 5:
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outputman();
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system("pause");
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break;
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default:break;
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}
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menu();
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scanf("%d",&n);
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}
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}
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void addman()
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{
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FILE *p1;
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int i,n,count=0; // count为学生人数
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if ((p1=fopen("D:\\课设1\\student.txt","a+"))==NULL) //打开linkman文件
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{
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printf("不能打开此文件");
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exit(0);
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}
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while(!feof(p1)) //feof为检测文件结束符
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{
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if(fread(&peo[count],LEN,1,p1)==1)
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count++;
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}
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fclose(p1); //关闭文件
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if(count==0)
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printf("\n\t\t学生信息列表为空!\n\n");
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else
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{
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system("cls"); //清屏
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outputman();
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}
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if ((p1=fopen("D:\\课设1\\student.txt","wb"))==NULL)//以二进制方式打开linkman文件
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{
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printf("\t\t不能打开学生信息列表\n");
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return;
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}
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for(i=0;i<count;i++)
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fwrite(&peo[i],LEN,1,p1);
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printf("\t\t是否添加学生信息（1 or 0):");
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scanf("%d",&n);
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while(n)
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{
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printf("\t\t请输入信息:\n");
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printf("\t\t姓名:");//输入姓名
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scanf("\t\t%s",&peo[count].name);
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for(i=0;i<count;i++)//该学生信息是否已经存在
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{
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if(strcmp(peo[i].name,peo[count].name)==0)
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{
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printf("\t\t该学生信息已存在！\n");
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getch();
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fclose(p1); //关闭文件
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return; //重新输入学生学习下
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}
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}
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printf("\t\t学号:"); //输入学号
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scanf("\t\t%s",&peo[count].num);
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printf("\t\tC语言成绩:"); //C语言成绩
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scanf("\t\t%d",&peo[count].score);
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fwrite(&peo[count],LEN,1,p1);
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printf("\t\t%s 添加成功!\n",peo[count].name);
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count++; //学生信息数目加一
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n=0;
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}
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fclose(p1);
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return;
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}
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void queryman()
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{
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FILE *p1;
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int i,n=1,m,count=0,flag=1;
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if ((p1=fopen("D:\\课设1\\student.txt","rb"))==NULL)//以二进制方式打开student文件
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exit(0);
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while(!feof(p1))//判断是否到达文件尾部
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if(fread(&peo[count],LEN,1,p1)) //将文件中的数据读到结构体中
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count++;
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fclose(p1);
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if(count==0)
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{
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printf("学生信息列表为空！\n");
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printf("请按任意键继续");
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return;
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}
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while(n)
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{
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system("cls");//清屏
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while(flag!=0)
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{
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printf("\n\t\t**********查询方式***********\n");
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printf("\t\t┌-------------------------------┐\n");
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printf("\t\t│ 1.姓名 │\n");
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printf("\t\t│ 2.学号 │\n");
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printf("\t\t│ 0.返回 │\n");
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printf("\t\t└-------------------------------┘\n");
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printf("\n\t\t请选择查询方式:");
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scanf("\t\t%d",&m);//选择查询式
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if(m==1)
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{
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char name[100];
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printf("\t\t请输入姓名：");
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scanf("%s",name);
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for(i=0;i<count;i++)
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{
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if(strcmp(name,peo[i].name)==0)
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{ tou();
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printf(FORMAT,DATA);
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}
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if(count==i)
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printf("\t\t该学生不存在！");
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}
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}
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if(m==2)
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{
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char num1[15];
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printf("请输入学号：");
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scanf("%s",num1);
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for(i=0;i<count;i++)
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{
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if(strcmp(num1,peo[i].num)==0)
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{ tou();
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printf(FORMAT,DATA);
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}
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if(count==i)
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printf("该学号学生不存在！");
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}
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}
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if(m==0) flag=0,n=0;
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}
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}
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}
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void update() //修改学生信息函数模块
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{
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FILE *p1;
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int i,m,n;
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int flag=1,count=0,j=1;
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char name[100];
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if ((p1=fopen("D:\\课设1\\student.txt","r+"))==NULL)//以二进制方式打开student文件
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exit(0);
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while(!feof(p1))//判断是否到达文件尾部
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if(fread(&peo[count],LEN,1,p1)==1) //将文件中的数据读到结构体中
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count++;
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fclose(p1); //关闭文件
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if(count==0)
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{
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printf("学生信息列表为空!\n");
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return;
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}
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while(j==1)
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{
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outputman();
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printf("请输入想要修改的学生的名字：");
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scanf("%s",name);
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for(i=0;i<count;i++)
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{
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if(strcmp(name,peo[i].name)==0)
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{
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printf("已找到学生信息!\n");
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printf("是否修改？（1 or 0）：");
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scanf("%d",&n);
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if(n==0)
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{ j=0;
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break;
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}
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while(n==1)
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{
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while(flag==1)
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{
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system("cls");//清屏
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printf("\n\t\t************选择修改项************\n");
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printf("\t\t┌-------------------------------┐\n");
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printf("\t\t│ 1.修C语言成绩 │\n");
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printf("\t\t│ 2.修改学号 │\n");
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printf("\t\t│ 0.返回 │\n");
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printf("\t\t└-------------------------------┘\n");
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printf("\n\t\t请选择功能前的数字:");
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scanf("\t\t%d",&m);//选择修改方式
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if(m==1)
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{
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printf("请输入要修改的信息：");
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scanf("%d",&peo[i].score);
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printf("修改成功！\n");
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getch();
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}
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if(m==2)
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{
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printf("请输入要修改的信息：");
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scanf("%s",&peo[i].num);
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printf("修改成功！\n");
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getch();
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}
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if(m==0)
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{
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n=0;//退出修改功能
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}
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printf("退出还是继续修改？（1 or 0）：");
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scanf("%d",&flag);
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if(flag==0) n=0,j=0;
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}
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}
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}
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if(i==count)
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printf("\n不存在该学生信息！");
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getch();
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break;
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}
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}
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if((p1=fopen("D:\\课设1\\student.txt","wb"))==NULL)
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return;
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for(i=0;i<count;i++)
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fwrite(&peo[i],LEN,1,p1);
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fclose(p1);
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}
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void outputman()
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{
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FILE *p1;
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int i,count=0;
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system("cls");
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if ((p1=fopen("D:\\课设1\\student.txt","rb"))==NULL)//以二进制方式打开student文件
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exit(0);
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while(!feof(p1))//判断是否到达文件尾部
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if(fread(&peo[count],LEN,1,p1)==1) //将文件中的数据读到结构体中
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count++;
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fclose(p1);
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tou();
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printf("\n低于60分的有：\n");
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for(i=0;i<count;i++)
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{
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if(peo[i].score<60)
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printf(FORMAT,DATA);
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}
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printf("\n大于60分小于80分的有：\n");
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for(i=0;i<count;i++)
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{
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if(peo[i].score>=60&&peo[i].score<80)
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printf(FORMAT,DATA);
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}
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printf("\n大于80分小于90分的有：\n");
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for(i=0;i<count;i++)
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{
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if(peo[i].score>=80&&peo[i].score<90)
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printf(FORMAT,DATA);
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}
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printf("\n大于90分的有：\n");
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for(i=0;i<count;i++)
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{
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if(peo[i].score>=90)
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printf(FORMAT,DATA);
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}
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wei();
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}
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void delman()
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{
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FILE *p1;
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int i,j,k=1,count=0;
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char name[100];
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if((p1=fopen("D:\\课设1\\student.txt","r+"))==NULL)
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return;
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while(!feof(p1))
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if(fread(&peo[count],LEN,1,p1)==1)
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count++;
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fclose(p1);
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if(count==0)
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{
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printf("学生信息列表为空");
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return;
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}
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outputman();
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printf("请输入想要删除的学生的名字：");
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scanf("%s",&name);
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for(i=0;i<count;i++)
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{
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if(strcmp(name,peo[i].name)==0)
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{
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printf("已找到该学生信息！\n是否删除（1 or 0)？");
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scanf("%d",&k);
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if(k==1)
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{
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for(j=i;j<count;j++)
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peo[j]=peo[j+1];
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count--;
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if((p1=fopen("D:\\课设1\\student.txt","wb"))==NULL)
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return;
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for(j=0;j<count;j++)
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fwrite(&peo[j],LEN,1,p1);
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fclose(p1);
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printf("删除成功！");
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return ;
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}
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}
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}
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}
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