Question

用switch语句实现下列菜单功能(c语言)感谢大神

*************************************
* 1---成绩输入 *
* 2—成绩插入 *
* 3---成绩查询 *
*　　　 4---成绩排序 *
* 5---成绩删除 *
* 6---成绩输出 *
* 0---退出 *
*************************************
请输入你的选择（0---6）；

Answer 1

#include<stdio.h>
main()
{
    int n=0;
    printf("*************************************\n");
    printf("*             1---成绩输入           *\n");
    printf("*             2---成绩插入           *\n");
    printf("*             3---成绩查询           *\n");
    printf("*             4---成绩排序           *\n");
    printf("*             5---成绩删除           *\n");
    printf("*             6---成绩输出           *\n");
    printf("*             0---退出               *\n");
    printf("*************************************\n");
    printf("请输入你的选择（0---6）");
    scanf("%d",&n);
    switch(n)
    {
        case 1:
                    printf("成绩输入\n");
                    /*此处添加相应的功能*/
                    break;
        case 2:
                    printf("成绩插入\n");
                    /*此处添加相应的功能*/
                    break;
        case 3:
                    printf("成绩查询\n");
                    /*此处添加相应的功能*/
                    break;
        case 4:
                    printf("成绩排序");
                    /*此处添加相应的功能*/
                    break;
        case 5:
                    printf("成绩删除\n");
                    /*此处添加相应的功能*/
                    break;
        case 6:
                    printf("成绩输出\n");
                    /*此处添加相应的功能*/
                    break;
        case 0:  
                    break; 
        default:
                    printf("error:Command not found");
                    break;
    }
}

Answer 2

#include <stdio.h>
#include <stdlib.h>
void menu()
{
system("cls");
printf(" ***********************************\n");
printf(" * 1---成绩输入 *\n");
printf(" * 2---成绩插入 *\n");
printf(" * 3---成绩查询 *\n");
printf(" * 4---成绩排序 *\n");
printf(" * 5---成绩删除 *\n");
printf(" * 6---成绩输出 *\n");
printf(" * 0---退出 *\n");
printf(" ***********************************\n");
}
int main()
{
char select[10] = {0};
while(1)
{
menu();
printf("please select:");
gets(select);
switch(select[0])
{
case '1':
break;
case '2':
break;
case '3':
break;
case '4':
break;
case '5':
break;
case '6':
break;
case '0':
exit(1);
default:
printf("输入错误。\n");
system("pause");
break;
}
}
return 0;
}

Answer 3

#include <stdio.h>
int main(void)
{
while(1)
{
printf("请输入操作项\n");
int i;
scanf("%d", &i);
switch(i)
{
case 1:
printf("成绩输入\n");
break;
case 2:
printf("成绩插入\n");
break;
case 3:
printf("成绩查询\n");
break;
case 4:
printf("成绩排序\n");
break;
case 5:
printf("成绩删除\n");
break;
case 6:
printf("成绩输出\n");
break;
default:
return 0;
}
}
}

Answer 4

1楼，建议初始化时，int i = -1或者什么值。