嵌套范围中的重复变量

#include <stdio.h>

int main(void)
{
  int count = 0;                                // Declared in outer block
  do
  {
    int count = 0;                              // This is another variable called count
    ++count;                                    // this applies to inner count
    printf(count = %d\n, count);
  }
  while( ++count <= 5);                // This works with outer count

  printf(count = %d\n, count);       // Inner count is dead, this is outer count
  return 0;
}