学步园

FILE 1: find.h

#ifndef HEAD_H_INCLUDED<br /> #define HEAD_H_INCLUDED<br /> #include <vector><br /> using namespace std;<br /> template <typename elem_type><br /> const elem_type *find(const vector<elem_type> &vec,<br /> const elem_type &value)<br /> {<br /> for(unsigned int ix = 0; ix < vec.size(); ++ix)<br /> {<br /> if(vec[ix] == value)<br /> {<br /> return &vec[ix];<br /> }<br /> }<br /> return 0;<br /> }<br /> #endif // HEAD_H_INCLUDED 

FILE 2: main.cpp

#include <vector><br /> #include <string><br /> #include <iostream><br /> #include "head.h"<br /> using namespace std;<br /> int main(void)<br /> {<br /> const int a_size = 5;<br /> const string a_string[a_size] = {"Gold", "Wood", "Water", "Fire", "Earth"};<br /> const string tag = "Wood";<br /> const vector<string> vec(a_string, a_string + a_size);<br /> cout << *find(vec, tag) << endl;<br /> return 0;<br /> }<br />