AbeMurica

#include <stdio.h>

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

void helloname(char* name)
{
  printf("Hello %s\n", name);
}


void main(int argc, char** argv)
{
  if(argc == 1)
    helloworld();
  else if(argc == 2)
    helloname(argv[1]);
  else
    printf("Goodbye World\n");
}