Vector Extended

#include<iostream>

#include<string>
#include<vector>
#include<windows.h>

using namespace std;

void createVec(vector<int>&);
void showVec(const vector<int>&);
void multVec(const vector<int>&);

int main(){

    cout << "ENTER VALUES (-1 to stop): ";

    vector<int> uVec;

    createVec(uVec);
    showVec(uVec);

    cout << "MULTIPLY? (yes or no): ";

    string yOr;
    cin >> yOr;

    if(yOr == "yes"){
        multVec(uVec);
    }else{
        cout << "COMPLETED";
    }

    system("pause");
    return 0;
}

void createVec(vector<int>& newVec){

    int uInput;
    cin >> uInput;

    while(uInput != -1){
        newVec.push_back(uInput);
        cin >> uInput;
    }

}

void showVec(const vector<int>& newVec){

    cout << "VECTOR: ";

    for(unsigned int i = 0; i < newVec.size(); i++){
        cout << newVec[i] << " ";
    }

}

void multVec(const vector<int>& newVec){

    cout << "BY WHAT NUMBER?: ";

    int uInput;
    cin >> uInput;

    for(unsigned int i = 0; i < newVec.size(); i++){
        cout << newVec[i] * uInput << " ";
    }

}