block.c

#include <stdio.h>
int main(){
  int i = 0;
  int a = 3;
  int b = 5;
  {
    int c = 7;
    printf(" c: %d\n", c);
    printf("&c: %u\n", &c);
  }
  printf("&b: %u\n", &b);
  int * c_ = ((unsigned long)&b) - sizeof(int);
  printf("c_: %u\n", c_);
  printf(" c: %d\n", *(c_));

  return 0;
}