scope.cpp

这是介绍C++非常经典的一本书,无论是初学者还是对C++有一定了解的人都值得看的一本书.

//: C03:Scope.cpp
// From Thinking in C++, 2nd Edition
// Available at http://www.BruceEckel.com
// (c) Bruce Eckel 2000
// Copyright notice in Copyright.txt
// How variables are scoped
int main() {
  int scp1;
  // scp1 visible here
  {
    // scp1 still visible here
    //.....
    int scp2;
    // scp2 visible here
    //.....
    {
      // scp1 & scp2 still visible here
      //..
      int scp3;
      // scp1, scp2 & scp3 visible here
      // ...
    } // <-- scp3 destroyed here
    // scp3 not available here
    // scp1 & scp2 still visible here
    // ...
  } // <-- scp2 destroyed here
  // scp3 & scp2 not available here
  // scp1 still visible here
  //..
} // <-- scp1 destroyed here
///:~