用指针数组编程实现：从键盘输入一个数字表示月份值n，程序输出该月
份的英文表示，如果n不在1--12之间，则输出“无效 月份”。

#include <stdio.h>
main()
{
    char *a[12]={"January","February","March","April","May","June",
        "July","August","September","October","November","December"};
    int month;
    scanf("%d", &month);
    if (month>0 && month<13)
        printf("%s\n", a[month-1]);
    else
        printf("无效 月份\n");
}

希望能对你有用

int main(void)
{
char *yue[12]={"1月","2月","3月","4月","5月","6月","7月","8月","9月","10月","11月","12月"};    
int  n=0;
printf("请输入月份\n");
do{
    scanf("%d",&n);
        if(n<1||n>12)
        {
        printf("无效的月份\n");
        }
        if(n>0&&n<=12)
        {
            printf("%s\n",*(yue+(n-1)));
        } 
     
   }while(n>0&&n<=12);
return(0);
}