C program to find the GCD and LCM of two integers

#include <stdio.h>
#include <conio.h>

void main()
{
    int  num1, num2, gcd, lcm, remainder, numerator, denominator;
    clrscr();

    printf("Enter two numbers\n");
    scanf("%d %d", &num1,&num2);

    if (num1 > num2)
    {
       numerator = num1;
       denominator = num2;
    }
    else
    {
       numerator = num2;
       denominator = num1;
    }
    remainder = num1 % num2;
    while(remainder !=0)
    {
numerator   = denominator;
denominator = remainder;
remainder   = numerator % denominator;
    }
    gcd = denominator;
    lcm = num1 * num2 / gcd;
    printf("GCD of %d and %d = %d \n", num1,num2,gcd);
    printf("LCM of %d and %d = %d \n", num1,num2,lcm);
} /* End of main() */
/*------------------------
Output
RUN 1
Enter two numbers
5
15
GCD of 5 and 15 = 5
LCM of 5 and 15 = 15
------------------------------*/