To find the square using function - C Language

/*To find the square using function*/

#include<stdio.h>

#include<conio.h>

void main()

{

int square(int);

int a,b;

clrscr();

printf("enter the value of a:: ");

scanf("%d",&a);

b=square(a);

printf("square is %d ::",b);

getch();

}

int square(int x)

{

int y;

y=x*x;

return(y);

}

/************************OUTPUT***************************

  enter the value of a:: 12

  square is::144 */