#include <stdio.h>
#include <string.h>
#include <stdlib.h>

int main (int argc, char **argv);

int main (int argc, char **argv) {

  int i;

 char *c = "HELLO";
 printf ("%s\n",c);
 c[0] = 'J';
 printf ("%c\n",c[0]);
 for (i=0; i < strlen(c); i++)
  printf ("%c",c[i]);
 printf ("\n");
 printf ("HELLO");
 printf ("\n");
 return 0;
}
/*
The GNU C Compiler for Windows would change the H to a J in the constant
string so that any subsequent time you said printf ("HELLO"), it would print JELLO instead.
*/