#include <stdio.h>

int main( int argc, char *argv[] )
{
   float a;
   int  b;

   a = 2;

   b = square( a );  // Call function square

   printf("a = %f\n", a);
   printf("b = %d\n", b);
}

int square( int x )                  
{
   return ( x * x );
}