chapter6-12.cpp

STL程序员开发指南源码

//文件名:CHAPTER6-12.cpp
#pragma warning(disable:4786)
#include <iostream.h>
#include <string>
#include <vector>
#include <algorithm>
using namespace std;
const string ToothbrushCode("0003");
class IsAToothbrush 
{public:  
	bool operator() ( string& SalesRecord ) {return SalesRecord.substr(0,4)==ToothbrushCode;}     
};
void main (void) 
{
  vector<string> SalesRecords;
  SalesRecords.push_back("0001 Soap");
  SalesRecords.push_back("0002 Shampoo");
  SalesRecords.push_back("0003 Toothbrush");
  SalesRecords.push_back("0004 Toothpaste");
  SalesRecords.push_back("0003 Toothbrush");
  int NumberOfToothbrushes(0);  
  NumberOfToothbrushes = count_if (SalesRecords.begin(), SalesRecords.end(),IsAToothbrush());
  cout << "There were " << NumberOfToothbrushes << " toothbrushes sold" << endl;
}