C program to find the GCD of two numbers

#include<stdio.h>

int main()

{

    int firstnum,secondnum;

    printf("enter the first number\n");

    scanf("%d",&firstnum);

    printf("enter the second number\n");

    scanf("%d",&secondnum);

    int i,small=firstnum<secondnum?firstnum:secondnum;

    int gcd;

    for(i=1;i<=small;i++)

    {

        if(firstnum%i==0 && secondnum%i==0)

        {

            gcd=i;

        }

    }

    printf("\n the GCD of %d and %d is: %d\n",firstnum,secondnum,gcd);

}

Output: