scope.cpp

来自「C++编程思想 第一卷：标准C++导引（美）Bruce Eckel著」· C++ 代码 · 共 35 行

//: 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
#include<iostream>
using namespace std;
int main() {
  int scp1=5;
  // scp1 visible here
  {
    // scp1 still visible here
    //.....
    int scp2=4;
    // scp2 visible here
    //.....
    {cout<<"scp1="<<scp1<<endl;
      // scp1 & scp2 still visible here
      //..
      int scp3=3;
      // scp1, scp2 & scp3 visible here
    cout<<"scp3="<<scp3<<endl;   // ...
    } // <-- scp3 destroyed here
    // scp3 not available here
   // scp1 & scp2 still visible here
    // ...
  } // <-- scp2 destroyed here
  // scp3 & scp2 not available here
  // scp1 still visible here
  //..
return 0;
} // <-- scp1 destroyed here
///:~