Proving A Point

//What looks wrong with this picture?  If you can't see the issue you don't know enough about programming yet.
//Look closely and you'll see what I mean.
#include <iostream>
#include <cmath>
using namespace std;

int main()
{
    int carrier = 100;
    int num = 20;
    int array[num];
    int array2[num];
    int result[carrier];

    cout << "Enter 20 numbers and I will add" << endl;
    cin >> array[carrier];
    cout << "Enter 20 numbers for the second array" << endl;
    cin >> array2[carrier];

    cout << "Now adding the numbers" << endl;

    result[carrier] = array[carrier] + array2[carrier];

    cout <<  result[carrier];



    system("pause");
    return 0;
}

//Next lets show a way to fix this.
#include <iostream>
#include <cmath>
using namespace std;

int main()
{
    const int carrier = 20;
    const int num = 20;
    int array1[num];
    int array2[num];
    int result[carrier];

    for(int T = 0; T < carrier; T++)
    {
        cout << "Enter a number for array one" << endl;
        cin >> array1[T];
        cout << "Enter a number for the second array" << endl;
        cin >> array2[T];

        cout << "Now adding the numbers" << endl;
        result[T] = array1[T] + array2[T];

        cout <<  result[T] << endl;
    }


    system("pause");
    return 0;
}