C-Program to Print GCD and LCM

#include<stdio.h>

int main()

{

int num1,num2,temp1,temp2,gcd,lcm,x;

printf("Enter number 1\n");

scanf("%d",&num1);

printf("Enter number 2\n");

scanf("%d",&num2); 

temp1=num1;

temp2=num2;

while(temp2!=0)

{

x=temp2;

temp2=temp1%temp2;

temp1=x;

}

gcd=temp1;

lcm=(num1*num2)/gcd;

printf("gcd is %d\n",gcd);

printf("Lcm is %d\n",lcm);

return 0; 

}

C-Program for Biggest of three numbers

#include<stdio.h>

int main() 

{

  int num1,num2,num3;

  printf("Enter a number 1\n");

  scanf("%d",&num1);

  printf("Enter a number 2\n");

  scanf("%d",&num2);

  printf("Enter a number 3\n");

  scanf("%d",&num3);

  if((num1>num2) && (num1>num3))

  {

     printf("%d is bigger\n",num1);

  }

  else if((num2>num1) && (num2>num3))

  {

    printf("%d is bigger\n",num2);

  }

  else

  {

    printf("%d is bigger\n",num3);

  }

return 0;

}