P51 10

P51 第十题  输入年号和月份，输出这一年的该月天数。（提示：要先判断输入年份是否为闰年）

#include<stdio.h>int main(){int a,b,c;printf("please input your year:\n");scanf("%d",&a);printf("please input your mouth:\n");scanf("%d",&b);if((a%4==0&&a%100!=0)||(a%400==0)){if(b==1||b==3||b==5||b==7||b==8||b==10||b==12) printf("%d月天数为31\n",b);if(b==2) printf("%d的月天数为29\n",b);if(b==4||b==6||b==9||b==11) printf("%d月天数为30\n",b);}else{if(b==1||b==3||b==5||b==7||b==8||b==10||b==12) printf("%d月天数为31\n",b);if(b==2) printf("%d月天数为28\n",b);if(b==4||b==6||b==9||b==11) printf("%d月天数为30\n",b);}return 0;}