#include <string.h>

void example1()
{
  volatile int n;
  char buf[8];
  volatile int x;

  n = 0x12345678;
  x = 0xdeadbeef;

  strcpy(buf, "abcdefghijk");
  // a=0x61 b=0x62 ...

  buf[8] = 0xab;

  buf[-4] = 0xcd;
}

int main ()
{
   example1 ();
   return 0;
}