Least Common Multiple and Greatest Common Divisor in c

Question

hi,

  input any two positive integers  how to seek their Least Common Multiple and Greatest Common Divisor in c.

thank.

#include<stdio>

void main(void)

{

    int x,y;

    printf("input any two positive integers:");

    scanf("%d %d",&x,&y);

   

    /*

      ...

   */

}