Adding 2 vectors component with component using stack

I have a problem with my C++ code. I need to make the sum of the vectors component by component. For example, if I have A(2,1) and B(3,3) the result should be (5,4). I tried to do something but apparently I have a problem and I don't know what to do. The error is: ,,No member called push in std::_1vector" My code is:

#include <iostream>
#include "stack_base.h"
#include <vector>

using namespace std;

template<typename T>
class App {
    public:
        Stack<T>  * stack;
        App(Stack<T> &stack) {
    this->stack = &stack;
}
      T sum(){
    Stack<T> *tempStack = stack;
    T sum=0;
    int size = stack->getTopLevel();
    for(int i=0; i<=size; i++) {
        sum+=tempStack->peek();
        tempStack->pop();
        }
    return sum;
}
      T substract(){
          Stack<T> tempStack = *stack;
          T substr=0;
          for(int i=0; i<=stack->getTopLevel(); i++) {
              substr-=tempStack.peek();
              tempStack.pop();
          }
          return substr;
      }
};
int main(){
    Stack<int> myStack;
    App<int> a(myStack);
    int values[7] = {5, 2, 3, 1, 4, 8, 6};
    int values1[7] = {5, 2, 3, 1, 4, 8, 6};
    unsigned int i = 0;
            vector <int> v1;
            vector <int> v2;
            vector <int> v3;
            cout << "Filling the Numbers\n";
            for (i=5;i < 125 ; i = i + 5) {
                myStack.push(v1[i/10]);
                myStack.push(v2[i/100]);
                myStack.push(v3[i]); 
                v3[i]=v1[i]+v2[i]; //here it's the problem
            }

            cout << "Adding the numbers\n";
            for (i = 0; i < v1.size(); i++) {
                    v3[i] = v1[i] + v2[i];
            }

            cout << "Printing the numbers\n";
                    for (i = 0; i < v3.size() ; i++) {
                            cout << v3[i];
                    }
    return 0;
}