#include <stdio.h>

void print_hello();

int main(void){
  print_hello();
  int a = 3;
  float b =4.3;

  printf("a is equal to %d\n", a);
  printf("b is equal to %f\n", b);  

  /*
   * what is happening here?
   * if you are interested, please read
   * http://stackoverflow.com/questions/7480097/what-happens-to-a-float-variable-when-d-is-used-in-a-printf
   */
  printf("a+b is equal to %d\n", a+b);

  return 0;
}

void print_hello(){
  printf("Hello World!\n");  
}