foreach (object x in obj_array) {
    for(double i = 0; i < x.end();) {
        foreach (object y in obj_array) {
            while (x != y) {
                for (double k = 0; k < y.end();) {
                    \\ call function to do work on x and y
                    print x;
                    print y;
                    k = k + y.step();
                }
            }
        }
    i = i + x.step();
    }
}