C-Algorithms/prime factor.c at 5793ac297ceee61fe194b5d4e8d9859b29bc8856 · PawanKolhe/C-Algorithms · GitHub

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#include <stdio.h>

int main()
{
    int i, j, num, isPrime;

    /* Input a number from user */
    printf("Enter any number to print Prime factors: ");
    scanf("%d", &num);

    printf("All Prime Factors of %d are: \n", num);

    /* Find all Prime factors */
    for(i=2; i<=num; i++)
    {
        /* Check 'i' for factor of num */
        if(num%i==0)
        {
            /* Check 'i' for Prime */
            isPrime = 1;
            for(j=2; j<=i/2; j++)
            {
                if(i%j==0)
                {
                    isPrime = 0;
                    break;
                }
            }

            /* If 'i' is Prime number and factor of num */
            if(isPrime==1)
            {
                printf("%d, ", i);
            }
        }
    }

    return 0;
}