chapter6-13.cpp

STL程序员开发指南源码

//文件名:CHAPTER6-13.cpp
#pragma warning(disable:4786)
#include <iostream.h>
#include <string>
#include <vector>
#include <algorithm>
using namespace std;
class IsAToothbrush 
{
public:
	IsAToothbrush(string& InToothbrushCode) : ToothbrushCode(InToothbrushCode) {}
	bool operator() (string& SalesRecord) 
	{ return SalesRecord.substr(0,4)==ToothbrushCode;	}       
private:
  string 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");
  string VariableToothbrushCode("0003");
  int NumberOfToothbrushes(0);  
  NumberOfToothbrushes = count_if (SalesRecords.begin(), SalesRecords.end(), 
IsAToothbrush(VariableToothbrushCode));
  cout << "There were  " << NumberOfToothbrushes << " toothbrushes matching code "<< "0003" << " sold" << endl;
}