/* c99: limiting the scope of variables declaring them when needed
   or declaring them in a block inside a block */

#include <stdio.h>

int main() {
  int x;
  x = 2;
  /* i cannot be used here */
  int i;
  i = x;

  /* Block inside a block */
  {
    /* This is another variable, it is not i=x */
    int i;
    i = 3;

    /* At the end of the block i=3 no longer exist */
  }
  /* i=x still exist */
  
  return 0;
}