#include <stdio.h>

static void recursive_print(const char * const str);

int main(void){
   recursive_print("Hello World\n");
   return 0;
}

static void recursive_print(const char * const str){
   if (str==NULL) return; 
   if (str[0]=='\0') return;
   printf("%c",str[0]);
   recursive_print(str+1);
   return;
}