statdest.cpp

来自「Thinking_in_C___2.rar」· C++ 代码 · 共 39 行

//: C10:Statdest.cpp
// From Thinking in C++, 2nd Edition
// at http://www.BruceEckel.com
// (c) Bruce Eckel 1999
// Copyright notice in Copyright.txt
// Static object destructors
#include <fstream>
using namespace std;
ofstream out("statdest.out"); // Trace file

class Obj {
  char c; // Identifier
public:
  Obj(char C) : c(C) {
    out << "Obj::Obj() for " << c << endl;
  }
  ~Obj() {
    out << "Obj::~Obj() for " << c << endl;
  }
};

Obj A('A'); // Global (static storage)
// Constructor & destructor always called

void f() {
  static Obj B('B');
}

void g() {
  static Obj C('C');
}

int main() {
  out << "inside main()" << endl;
  f(); // Calls static constructor for B
  // g() not called
  out << "leaving main()" << endl;
} ///:~