请问这个程序为什么不能正常运行？
#include <stdio.h>
main()
{
int year,month,days;
printf("请输入一个年份月份：");
scanf("%d%d",&year,&month);
if((year%400==0)||(year%4==0&&year%100!=0))
if(month==2) days=29;
else if(month==4||month==6||month==9||month==11) days=30;
else days=31;
printf("%d年是闰年，%d月是%d天\n",year,month,days);
if(month==2) days=28;
else if(month==4||month==6||month==9||month==11) days=30;
else days=31;
printf("%d年不是闰年，%d月是%d天\n",year,month,days);
}
初一
2016-9-23 17:25:29
#include <stdio.h>
main()
{
int year,month,days;
printf("请输入一个年份月份：");
scanf("%d%d",&year,&month);
if((year%400==0)||(year%4==0&&year%100!=0))
printf("%d年是闰年",year);
if(month==2) days=28;
else if(month==4||month==6||month==9||month==11) days=30;
else days=31;
printf("%d月是%d天\n",month,days);
}
