一个简单的字符串查找程序

FILE 1: find.h

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

FILE 2: main.cpp

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