#include <stdio.h>
int main()
{                       // Block 1
  int x = 4;
  int y = 0;

  {                   // Block 2
    int x = 3;
    int z = x + 1;
    printf("x = %d     z = %d\n", x, z);
  }

  y = x + 1;
  printf("x = %d     y = %d\n", x, y);
}