#include<bits/stdc++.h> using namespace std; struct xue { int Chinese; int Math; int English; }a[1001]; int main() { int n; float chz=0,maz=0,enz=0; cin>>n; for(int i=1;i<=n;i++) { cin>>a[i].Chinese>>a[i].Math>>a[i].English; chz+=a[i].Chinese; maz+=a[i].Math; enz+=a[i].English; } chz/=n1.0; maz/=n1.0; enz/=n*1.0; cout<<fixed<<setprecision(1)<<chz<<" "<<maz<<" "<<enz; return 0; }

#include<bits/stdc++.h>
using namespace std;
struct xue{
	int Chinese;
	int Math;
	int English;
}a[1001];
int main(){
	int n;
	float chz=0,maz=0,enz=0;
	cin>>n;
	for(int i=1;i<=n;i++){
		cin>>a[i].Chinese>>a[i].Math>>a[i].English;
		chz+=a[i].Chinese;
		maz+=a[i].Math;
		enz+=a[i].English;
	}
	chz/=n*1.0;
	maz/=n*1.0;
	enz/=n*1.0;
	cout<<fixed<<setprecision(1)<<chz<<" "<<maz<<" "<<enz;
	return 0;
	}

这是用结构体的方法