额，我用别的方法写了下，但是感觉思路很乱，有没有大佬帮忙加下注释

#include<bits/stdc++.h>
using namespace std;

const int sad=8;
int last=-1e6;

class Jin{
public:
	int school,home,lans;
	int today(void);
	bool son(Jin an,int n);
	friend void ans(Jin a);
};

Jin a;

int Jin::today(void){
	return school+home;
}

bool son(Jin an){
	if(an.today()>sad) return true;
	return false;
}

void ans(Jin al,int n){
	if(al.today()>last && son(al)) {
		last=al.today();
		a.lans=n;
//		cout<<" -- "<<a.lans<<endl;
	}
}

int main(){
	for(int i=1;i<=7;i++){
		cin>>a.school>>a.home;
//		cout<<a.today()<<' '<<a.lans<<endl;
		ans(a,i);
	}
	cout<<a.lans<<endl;
	return 0;
}