#include<bits/stdc++.h>
using namespace std;
vector<int>a;
int main(){
//	cin>>s;
//	n=s.size();
//	s=" "+s;
	a.push_back(1);
	a.push_back(2);
	a.push_back(3);
	a.push_back(4);
	a.push_back(5);
	for(auto i:a){
		cout<<*i<<" ";
	}
	return 0;
}

显示i没有定义