题解 | 计算一年中的第几天

#include <iostream>
using namespace std;
#include<vector>
int main() {
    int y,m,d;
   while( cin>>y>>m>>d){
   vector<int>v_mouthday,v_mouthday_runnian;
   v_mouthday={31,28,31,30,31,30,31,31,30,31,30,31};
   v_mouthday_runnian={31,29,31,30,31,30,31,31,30,31,30,31};
    bool isrunnian=0;
    if(y%400==0||y%100==0&&y%4==0){
       isrunnian=1;
    }
    int sumday=0;
    for(int i=0;i<m-1;i++){
        if(isrunnian==0){
            sumday+=v_mouthday[i];
        }
        else{
            sumday+=v_mouthday_runnian[i];
        }
    }
    sumday+=d;
    cout<<sumday<<endl;
   }
}
// 64 位输出请用 printf("%lld")