Code not giving output

#1

#include
#include
using namespace std;

class stack{
private:
vector v;
public:

void push(int data){
    v.push_back(data);
}
bool empty(){
    return v.empty()==0;
}
void pop(){
    if(!empty()){
        return v.pop_back();
    }
}
int top(){
    return v[v.size()-1];
}

};

int main(){
stack s;

for(int i=1;i<=5;i++){          
    s.push(i*i);
}


while(!s.empty()){
    cout<<s.top()<<endl;
    s.pop();
}
return 0;

}

#2

@dhruvj797,


correction done and commented

#3

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