第2个回答 推荐于2017-09-28
#include <stdio.h>
int main(void)
{
int month;
printf("please input the month number :");
scanf("%d", &month);
if (month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10 || month == 12)
{
printf("2003.%d has 31 days\n", month);
}
else if (month == 4 || month == 6 || month == 9 || month == 11)
{
printf("2003.%d has 30 days\n", month);
}
else if (month == 2)
{
printf("2003.%d has 28 days\n", month);
}
else
{
printf("Invalid month input !\n");
}
return 0;
}本回答被提问者采纳
第3个回答 2011-11-04
#include "stdio.h"
void main()
{
int m[12] = {31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
int a;
scanf("%d", &a);
printf("%d 月是%d 天\n", a, m[a - 1]);
}
第4个回答 2011-11-04
scanf("%d",&i);
swich(i)
{
case 1: day = 31;
case 2: day = 28;
case12: day = 31;
}
printf("%d月有%d天\n",i,day);