foreach.cpp

来自「This is the second part of that lab manu」· C++ 代码 · 共 38 行

//: C08:ForEach.cpp
// From "Thinking in C++, 2nd Edition, Volume 2"
// by Bruce Eckel & Chuck Allison, (c) 2001 MindView, Inc.
// Available at www.BruceEckel.com.
// Use of STL for_each() algorithm
//{L} ../TestSuite/Test
//{-g++295}
//{-g++3}
//{-msc}
#include "Counted.h"
#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

// Simple function:
void destroy(Counted* fp) { delete fp; }

// Function object:
template<class T>
class DeleteT {
public:
  void operator()(T* x) { delete x; }
};

// Template function:
template <class T>
void wipe(T* x) { delete x; }

int main() {
  CountedVector A("one");
  for_each(A.begin(), A.end(), destroy);
  CountedVector B("two");
  for_each(B.begin(),B.end(),DeleteT<Counted>());
  CountedVector C("three");
  for_each(C.begin(), C.end(), wipe<Counted>);
} ///:~