题解 | #今年的第几天？#

#include <iostream>
//输入年月日计算是第几天
bool IsLeapYear(int year){
    return ((year%4==0&&year%100!=0)||year%400==0);
}
int dayTab[2][13]={
        {0,31,28,31,30,31,30,31,31,30,31,30,31},
        {0,31,29,31,30,31,30,31,31,30,31,30,31}
};
int main() {
    int year,month,day;
    int row;//如果是闰年，IsLeapYear函数结果是1，若不是为0
    while(scanf("%d %d %d",&year,&month,&day)!=EOF){
        row= IsLeapYear(year);
        int sum=0;
        for(int i=0;i<month;i++){
            sum+=dayTab[row][i];
        }
        sum=sum+day;
        printf("%d\n",sum);
    }

    return 0;
}