简单易懂的代码

#include <bits/stdc++.h>
using namespace std;
int a,b,c,d,e,f,sum = 0;
int main(){
	cin >> a >> b >> c >> d >> e >> f;
	while(!(a == d && b == e && c == f)){
		c++;
		sum++;
		if((b == 1 || b == 3 || b == 5 || b == 7 || b == 8 || b == 10 || b == 12) && c == 32){
			c = 1;
			b++;
		}
		if((b == 4 || b == 6 || b == 9 || b == 11) && c == 31){
			c = 1;
			b++;
		}
		if(b == 2 && ((a % 100 == 0 && a % 400 == 0) || (a % 100 != 0 && a % 4 == 0)) && c == 30){
			c = 1;
			b++;
		}
		if(b == 2 && (!((a % 100 == 0 && a % 400 == 0) || (a % 100 != 0 && a % 4 == 0))) && c == 29){
			c = 1;
			b++;
		}
		if(b == 13){
			b = 1;
			a++;
		}
	}
	cout << sum << endl;
	return 0;
}