7-19 计算天数
#include<stdio.h>
main()
{
int year,month,day;
int R=0;
scanf("%d/%d/%d",&year,&month,&day);
if(((year%4 == 0)&&(year%100 != 0)) || (year%400 == 0))
{
R=1;
}
for(int i=1;i<month;i++)
{
if(i<9){
if(i%2!=0||i==8)
{
day+=31;
}
else{
day+=30;
}
}
else
{
if(i%2==0)
{
day+=31;
}
else{
day+=30;
}
}
}
if(R==1)
{
day=day-1;
}
else
{
day=day-2;
}
printf("%d",day);
}
if(((year%4 == 0)&&(year%100 != 0)) || (year%400 == 0))
运算每一层要用括号 闰年判断