Excluding

for (i = 0; i < VERTEXES; i++) {
        for (j = 0; j < VERTEXES; j++) {
            cout << a[i][j] << " ";
        }
        cout << endl;
    }
    int exc_num;
    cout << "How many points be excluded: "; cin >> exc_num; cout << endl;
    int k;
    int *exc = new int[exc_num];
    for (k = 0; k < exc_num; k++) {
        cout << "Enter point #" << k << ": "; cin >> exc[k];
    }
    for (k = 0; k < exc_num; k++) {
        for (j = 0; j < VERTEXES; j++) {
            a[exc[k]][j] = 0;
        }
        for (i = 0; i < VERTEXES; i++) {
            a[i][exc[k]] = 0;
        }
    }
    for (i = 0; i < VERTEXES; i++) {
        for (j = 0; j < VERTEXES; j++) {
            cout << a[i][j] << " ";
        }
        cout << endl;
    }