find_if.cpp

来自「本课程主要介绍面向对象程序设计的方法和c++语言的基本概念。以c++语言中的面向」· C++ 代码 · 共 29 行

// find_if.cpp
// searches array of strings for first name that matches "Don"
#include <iostream>
#include <string>        
#include <algorithm>
using namespace std;
//--------------------------------------------------------------
bool isDon(string name)      // returns true if name=="Don"
   {
   return name == "Don";
   }
//--------------------------------------------------------------
string names[] = { "George", "Estelle", "Don", "Mike", "Bob" };

int main()
   {
   string* ptr;
   ptr = find_if( names, names+5, isDon );

   if(ptr==names+5)
      cout << "Don is not on the list.\n";
   else
      cout << "Don is element "
           << (ptr-names)
           << " on the list.\n";
   return 0;
   }