#include <stdio.h>

extern  int   a, b;
extern  float c, d;

void print( );
 
int main( int argc, char *argv[] )
{
   a = 2;  
   b = 3;

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

   c = 2.0;
   d = 3.0;

   printf( "c = %f, d = %f\n", c, d);

   print( );         // Call print( );
}