chapter11-2.cpp

C++STL程序员开发指南

//文件名:CHAPTER11-2.cpp
#pragma warning(disable: 4786)
#include <iostream>
#include <algorithm>
#include <functional>
#include <string>
#include <vector>
using namespace std;
void main()
{
    const int VECTOR_SIZE = 8 ;
    // Define a template class vector of strings
    typedef vector<string > StringVector ;
    //Define an iterator for template class vector of strings
    typedef StringVector::iterator StringVectorIt ;
    StringVector NamesVect(VECTOR_SIZE) ;   //vector containing names
    string value("Sea") ;  // stores the value used to count matching elements
    StringVectorIt start, end, it ;
    int result = 0 ;   // stores count of elements that match value.
    // Initialize vector NamesVect
    NamesVect[0] = "She" ;
    NamesVect[1] = "Sells" ;
    NamesVect[2] = "Sea" ;
    NamesVect[3] = "Shells" ;
    NamesVect[4] = "by" ;
    NamesVect[5] = "the" ;
    NamesVect[6] = "Sea" ;
    NamesVect[7] = "Shore" ;
    start = NamesVect.begin() ;   // location of first element of NamesVect
    end = NamesVect.end() ;       // one past the location last element of NamesVect
    // print content of NamesVect
    cout << "NamesVect { " ;
    for(it = start; it != end; it++) cout << *it << " " ;
    cout << " }\n" << endl ;
    // Count the number of elements in the range [first, last +1) that match value.
    result = count(start, end, value) ;
    // print the count of elements that match value
    cout << "Number of elements that match \"Sea\" = "<< result << endl  ;
}