abcdproblem

/*
 * main.c
 *
 *  Created on: 22 jun. 2019
 *      Author: sergiosanz
 */

#include<stdio.h>

int main(int argc, char *argv[])
{
    int i = 0;

    for (int a = 0; a < 10; a++)
    {
        for (int b = 0; b < 10; b++)
        {
            for (int c = 0; c < 10; c++)
            {
                for (int d = 0; d < 10; d++)
                {
                    int num = a * 1000 + b * 100 + c * 10 + d;
                    int num1 = a * 10 + b;
                    int num2 = b * 10 + c;
                    int num3 = c * 10 + d;
                    if (num1 * num2 * num3 == num)
                    {
                        i++;
                        printf("\n%4d: %d %d %d %d", i, a, b, c, d);
                    }
                }
            }
        }
    }

    return 0;
}