three_digits_numbers_v2.c

/*

    three_digits_numbers_v2.c

    Task:
    How many three digits numbers can be formed using the digits 1 to 9
    such that digits in
    Hundred's place is  greater than the digits in Ten's place and
    the digits in Ten's place is greater than the digits in Unit's place ?


    You can find all my C programs at Dragan Milicev's pastebin:

    https://pastebin.com/u/dmilicev

*/

#include <stdio.h>

int main(void)
{
    int h, t, u, number_of_solutions=0, number_of_iterations=0;

    // from 321 to 987
    for(h=3; h<10; h++)
    {
        printf("\n\n");

        for(t=2; t<9; t++)
            for(u=1; u<8; u++)
            {
                number_of_iterations++;
                if( h>t && t>u )
                {
                    number_of_solutions++;
                    printf(" %d%d%d", h, t, u );
                }
            }
    }

    if( number_of_solutions == 0 )
        printf("\n There is no such numbers. \n");
    else
        printf("\n\n There are %d such numbers. \n", number_of_solutions );

    printf("\n Number of iterations %d. \n", number_of_iterations );

    return 0;

} // main()