程序代码：

#include<stdio.h>
int main()
{
    int a;

    while (1)
    {
        printf("请任意输入一个1~7之间的数字：");
        scanf("%d",&a);
        switch (a)
        {
        case 1:printf("Monday\n");break;
        case 2:printf("Tuesday\n");break;
        case 3:printf("Wednesday\n");break;
        case 4:printf("Thursday\n");break;
        case 5:printf("Friday\n");break;
        case 6:printf("Saturday\n");break;
        case 7:printf("Sunday\n");break;
        default:printf("输入错误，请重新输入\n");break;           
        }
       
    }
    return 0;

程序代码：

/******************************************************************************
  题目: 按“月/日/年”的格式接受用户输入的日期，然后按照“月 日, 年”的格式显示，其
        中“月”用英文全名.
        
  演示: 
        
  邮箱：mumu3w@ 
  
  时间：11/05/2015 
  
******************************************************************************/

#include <stdio.h>
#include <ctype.h>



int main(void){
    const char *month[] = {"January", "February", "March", 
                            "April", "May", "June", 
                            "July", "August", "September", 
                            "October", "November", "December"};
                            
    int dd, mm, yyyy;
    
    printf("Enter a date (mm/dd/yy): ");
    scanf("%d/%d/%d", &mm, &dd, &yyyy);
    
    printf("You entered the date %s %.2d, %4d", month[mm-1], dd, yyyy);
    
    return 0;
}