stl hash_map
#include <cstdlib>
#include <iostream>
#include <string>
#include <hash_map.h>/*因为hash_map暂不为CPP标准所以没办法写为<hash_map>*/
/*-------------------------------------------*/
using std::cout;
using std::endl;
using std::string;
/*-------------------------------------------*/
/*函数类
*作为hash_map的hash函数
*string没有默认的hash函数
*/
class str_hash{
public:
size_t operator()(const string& str) const
{
unsigned long __h = 0;
for (size_t i = 0 ; i < str.size() ; i ++)
__h = 5*__h + str[i];
return size_t(__h);
}
};
/*-------------------------------------------*/
/*函数类
*作为hash_map的比较函数 )
*(查找的时候不同的key往往可能对用到相同的hash值
*/
class str_compare
{
public:
bool operator()(const string& str1,const string& str2)const
{return str1==str2;}
};
/*-------------------------------------------*/
int
main(int argc, char *argv[])
{
hash_map<string,string,str_hash,str_compare> myhash;

myhash["google"]="newplan";

myhash["baidu"]="zhaoziming";

if(myhash.find("google")!=myhash.end())
cout<<myhash["google"]<<endl;

system("PAUSE");

return EXIT_SUCCESS;
}
/*-------------------------------------------*/