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#include<stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <conio.h>
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#define N 1000
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typedef struct student
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{
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int number;
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char name[20];
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int grade;
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int yu;
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int shu;
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int ying;
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int sum;
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}STUDENT;
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STUDENT student[N];
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void zhu();
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void DengJi();
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void ShanChu();
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void LiuLan();
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void ChaZhao();
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void PaiXu();
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void menu();
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int shuliang=0; //记录学生数量
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void zhu() //返回主界面
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{
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char shibie[20];
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printf("请问是否继续操作，请输入yes or no\n");
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scanf("%s",&shibie);
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if(strcmp(shibie,"yes")==0)
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{
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menu();
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}
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else if(strcmp(shibie,"no")==0)
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exit(0); //库函数，退出系统
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else
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{
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printf("请输入正确的字符，谢谢！");
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zhu();
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}
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}
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void DengJi() //登记学生信息
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{
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int sm; //记录学生数目
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int i,k=1;
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system("CLS");
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printf("请输入需要输入几个学生信息：");
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scanf("%d",&sm);
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for(i=shuliang;i<shuliang+sm;i++,k++)
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{
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printf("请输入第%d个学生的学号：",k);
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scanf("%d",&student[i].number);
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printf("请输入学生的姓名：");
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scanf("%s",&student[i].name);
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//cout<<"请输入学生3门课的成绩：";
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printf("请输入语文成绩：");
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scanf("%d",&student[i].yu);
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printf("请输入数学成绩：");
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scanf("%d",&student[i].shu);
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printf("请输入英语成绩：");
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scanf("%d",&student[i].ying);
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}
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shuliang=shuliang+sm;
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zhu();
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}
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void ShanChu() //删除学生信息
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{
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char shanchuinfo[10];
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system("CLS"); //库函数，清屏
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printf("删除全部学生信息请输入\"all\"，删除指定学号的学生信息请输入\"one\"\n");
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scanf("%s",&shanchuinfo);
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if(strcmp(shanchuinfo,"all")==0)
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{
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int j;
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printf("你删除的学生信息如下：\n");
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printf("------学号-------姓名------语文-------数学-------英语-------\n");
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for(j=0;j<shuliang;j++)
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printf("------%d--------%s----------%d----------%d----------%d-------\n",student[j].number,student[j].name,student[j].yu,student[j].shu,student[j].ying);
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shuliang=0;
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printf("删除成功\n");
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}
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else if(strcmp(shanchuinfo,"one")==0)
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{
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struct student *p=NULL;
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int choice;
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int i,j,k=0;
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printf("请输入你要删除的学生的学号:");
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scanf("%d",&choice);
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for(i=0;i<shuliang;i++)
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{
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if(choice==student[i].number)
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{
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k=1;j=i;break;
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}
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}
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if(k)
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{
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if(shuliang==1)
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{
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p=&student[0];
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free(p);
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shuliang=0;
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}
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else
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{
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for(i=j;i<shuliang;i++)
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{
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student[i]=student[i+1];
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}
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shuliang=shuliang-1;
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}
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printf("删除成功\n");
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}
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else
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{
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printf("输入数据错误！");
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}
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}
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zhu();
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}
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void LiuLan() //浏览函数
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{
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int i;
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system("CLS");
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if(shuliang==0)
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{
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printf("系统里面没有任何学生的信息！");
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}
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else
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{
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for(i=0;i<shuliang;i++)
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{
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student[i].sum=student[i].yu+student[i].shu+student[i].ying;
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printf("\t\t☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆\n");
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printf("\t\t第%d个学生的学号为：%d\n",i+1,student[i].number);
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printf("\t\t第%d个学生的姓名为：%s\n",i+1,student[i].name);
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printf("\t\t第%d个学生的语文成绩为：%d\n",i+1,student[i].yu);
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printf("\t\t第%d个学生的数学成绩为：%d\n",i+1,student[i].shu);
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printf("\t\t第%d个学生的英语成绩为：%d\n",i+1,student[i].ying);
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printf("\t\t第%d个学生的总成绩为：%d\n",i+1,student[i].sum);
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printf("\t\t☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆\n");
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}
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}
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zhu();
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}
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void ChaZhao() //查找信息
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{
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int xx,choice;
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char yy[20];
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int i,j,k=0;
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system("CLS");
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if(shuliang==0)
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{
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printf("系统里面没有任何学生的信息！");
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zhu();
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}
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printf("两种查找方式：按学号，按姓名\n如果按学号查找请输1，如果按姓名查找请输2\n请输入您查找的方式：");
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scanf("%d",&choice);
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if(choice==1)
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{
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printf("请输入需要查找学生的学号：");
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scanf("%d",&xx);
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printf("您所查找的学生的信息为：\n");
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printf("----学号----姓名----语文成绩----数学成绩----英语成绩----\n");
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for(i=0;i<shuliang;i++)
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{
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if(xx==student[i].number)
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{
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j=i;k=1;
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printf("-----%d--------%s--------%d--------%d--------%d------\n",student[j].number,student[j].name,student[j].yu,student[j].shu,student[j].ying);
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}
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}
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if(k==0)
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printf("输入信息有误：");
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}
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else if(choice==2)
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{
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printf("请输入需要查找学生的姓名:\n");
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scanf("%s",yy);
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printf("您所查找的学生的信息为：\n");
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printf("----学号----姓名----语文成绩----数学成绩----英语成绩----\n");
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for(i=0;i<shuliang;i++)
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{
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if(strcmp(yy,student[i].name)==0)
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{
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j=i;k=1;
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printf("-----%d--------%s--------%d--------%d--------%d-----\n",student[j].number,student[j].name,student[j].yu,student[j].shu,student[j].ying);
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}
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}
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if(k==0)
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printf("输入信息有误：");
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}
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zhu();
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}
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void PaiXu() //排序函数
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{
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struct student *p1[N],**p2,*temp;
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int i,j;
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system("CLS");
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p2=p1;
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for( i=0;i<shuliang;i++)
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{
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p1[i]=student+i;
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}
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for( i=0;i<shuliang;i++)
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{
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for( j=i+1;j<shuliang;j++)
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{
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if((*(p2+i))->sum<(*(p2+j))->sum)
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{
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temp=*(p2+i);*(p2+i)=*(p2+j);*(p2+j)=temp;
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}
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}
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}
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printf("按照总成绩排序之后的信息为：\n");
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printf("----学号----姓名----总成绩----\n");
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for( i=0;i<shuliang;i++)
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{
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student[i].sum=student[i].yu+student[i].shu+student[i].ying;
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printf("-----%d--------%s--------%d------\n",(*(p2+i))->number,(*(p2+i))->name,(*(p2+i))->sum);
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}
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zhu();
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}
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void menu()
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{
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int n=0;
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system("CLS");
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printf("\t\t☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆\n");
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printf("\t\t☆===============学生信息管理系统=================☆\n");
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printf("\t\t☆= 1.登记学生信息 =☆\n");
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printf("\t\t☆= 2.删除学生信息 =☆\n");
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printf("\t\t☆= 3.浏览学生信息 =☆\n");
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printf("\t\t☆= 4.查找学生信息 =☆\n");
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printf("\t\t☆= 5.根据总成绩排序 =☆\n");
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printf("\t\t☆= 6.退出系统 =☆\n");
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printf("\t\t☆================================================☆\n");
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printf("\t\t☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆\n");
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printf("\t\t*请选择*");
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scanf("%d",&n);
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switch (n)
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{
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case 1:
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DengJi();break; //登记信息
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case 2:
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ShanChu();break; //删除信息
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case 3:
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LiuLan();break; //浏览信息
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case 4:
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ChaZhao();break; //查找信息
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case 5:
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PaiXu();break; //对成绩排序
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case 6:
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exit(0);break; //退出系统
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}
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}
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int main()
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{
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menu();
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return 0;
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}
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