combinations of a set with given number elements

Question

i have tried to do that but could not figure it out ,

lets say i have a set : {1,2,3,4,5}

and i want to have the combinations of 2 elements lik

Answer 1

You can accomplish this using 2 for-loops. In the first loop, you iterate through the elements as i and in the second loop from the value j=i+1 to the end of the count of the number of elements in the set.

It could be something like this:

 for (i = 0; i < length_set; i++)
{
    for (j = i + 1;length_set; j++)
    {
        print ("%d%d\n", set[i], set[j]);
    }
}

}

NOTE: Its just a pseudocode and i have not checked for syntax, It is just to show the logic.