// Command line compilation:  gcc structs_3.c geometric_calculations.c

#include "geometric_objects.h"

int main() {

  Circle c1 = { 3.14 };
  Triangle t1 = { 5, 8 };

  printf( "c1's area is:  %f\n", circle_area( c1 ) );
  printf( "t1's area is:  %f\n", triangle_area( t1 ) );

  return 0;
}