include iostream using namespace std int main double array 21 11 cout

#include <iostream>

using namespace std;

int main() {

    double array[21][11];

    cout << "f(x, y) = x + y; 0 <= x <= 20, 0 <= y <= 10" << endl;

    for (int x = 0; x <= 20; ++x) {
        for (int y = 0; y <= 10; ++y) {
            array[x][y] = x + y;
        }
    }

    for (int x = 0; x <= 20; ++x) {
        for (int y = 0; y <= 10; ++y) {
            cout << "array[" << x << "][" << y << "] - " << array[x][y] << endl;
        }
    }

    return 0;
}