VS关于hash_map使用的一些经常使用构造方法汇总，包含基本类型和结构体，相信够一般模仿使用：

# include<hash_map>

#include<iostream>

#include<string>

struct order

{

	char orderNO[20];

	char name[10];

	int NO;

	char type;

};

typedef order Order;

struct cmp{

	 enum

    {

        bucket_size=100,

    };

	size_t operator()(Order order1)

	{

		return sizeof(order1.orderNO)+sizeof(order1.name)+sizeof(order1.NO)+sizeof(order1.type);

	}

	bool operator()(Order order1,Order order2)

	{

		if(strcmp(order1.orderNO,order2.orderNO)>0)

			return true;

		else if(strcmp(order1.orderNO,order2.orderNO)<0)

			return false;

		else

		{

           if(strcmp(order1.name,order2.name)>0)

			return true;

		else if(strcmp(order1.name,order2.name)<0)

			return false;

		else{

			if(order1.NO>order2.NO)return true;

			else if(order1.NO<order2.NO)return false;

			else{

				if(order1.type>order2.type)return true;

				else return false;

			}

		}

		}

	}

};

struct CharLess : public std::binary_function<const char*,const char*, bool>

{

public:

    result_type operator()(const first_argument_type& _Left, const second_argument_type& _Right) const

    {

        return(stricmp(_Left, _Right) < 0 ? true : false)<span style="font-family: Arial, Helvetica, sans-serif;">;</span>

    }

};

struct CharLess1 : public std::binary_function<char*, char*, bool>

{

public:

    result_type operator()(const first_argument_type& _Left, const second_argument_type& _Right) const

    {

        return(stricmp(_Left, _Right) < 0 ? true : false);

    }

};

void testHashMap()

{

	stdext::hash_map<int,int> mhasp_map1;

	for(int i=0;i<9;i++)

		mhasp_map1.insert(stdext::pair<int,int>(i,i+10));

	stdext::hash_map<int,int>::iterator mit1=mhasp_map1.begin();

	while(mit1!=mhasp_map1.end())

	{

		std::cout<<mit1->first<<"    "<<mit1->second<<std::endl;

		mit1++;

	}

	stdext::hash_map<const char*,std::string,std::hash_compare<const char *,CharLess> > testhash;

	testhash["东方不败"]="葵花宝典，技压群雄";

	testhash["西门吹雪"]="寒剑三尺，削铁如泥";

	testhash["上官玉儿"]="花容月貌，一笑倾城";

	stdext::hash_map<const char *,std::string,std::hash_compare<const char *,CharLess> >::iterator testhashit=testhash.begin();

	while(testhashit!=testhash.end())

	{

		std::cout<<testhashit->first<<"    "<<testhashit->second.c_str()<<std::endl;

		testhashit++;

	}

	char a[20];

	scanf("%s",a);

	std::cout<<testhash.find(a)->first<<std::endl;

	stdext::hash_map<char *,std::string,std::hash_compare<char *,CharLess1> > testhash1;

	testhash1["东方不败"]="葵花宝典。技压群雄";

	testhash1["西门吹雪"]="寒剑三尺，削铁如泥";

	testhash1["上官玉儿"]="花容月貌，一笑倾城";

	stdext::hash_map<char *,std::string,std::hash_compare<char *,CharLess1> >::iterator testhashit1=testhash1.begin();

	while(testhashit1!=testhash1.end())

	{

		std::cout<<testhashit1->first<<"    "<<testhashit1->second<<std::endl;

		testhashit1++;

	}

	//char a[20];

	scanf("%s",a);

	std::cout<<testhash.find(a)->first<<std::endl;

	//std::cout<<testhash1.find("东方不败")->first<<std::endl;

stdext::hash_map<std::string,std::string> testhash2;

	testhash2["东方不败"]="葵花宝典，技压群雄";

	testhash2["西门吹雪"]="寒剑三尺，削铁如泥";

	testhash2["上官玉儿"]="花容月貌。一笑倾城";

	stdext::hash_map<std::string,std::string>::iterator testhashit2=testhash2.begin();

	while(testhashit2!=testhash2.end())

	{

		std::cout<<testhashit2->first<<"    "<<testhashit2->second<<std::endl;

		testhashit2++;

	}

	scanf("%s",a);

	std::string str(a);

	std::cout<<testhash2.find(str)->first<<std::endl;

	Order order1={"SR405","小麦",100,10};

	Order order2={"SR406","小麦",100,10};

	Order order3={"SR406","小米",100,10};

	Order order4={"SR406","小米",101,10};

	Order order5={"SR406","小米",101,11};

	stdext::hash_map<Order,std::string,cmp> teststruct;

	teststruct.insert(std::pair<Order,std::string>(order1,"sr112"));

	teststruct.insert(std::pair<Order,std::string>(order2,"sr113"));

	teststruct.insert(std::pair<Order,std::string>(order3,"sr114"));

	teststruct.insert(std::pair<Order,std::string>(order4,"sr115"));

	teststruct.insert(std::pair<Order,std::string>(order5,"sr116"));

	stdext::hash_map<Order,std::string,cmp>::iterator it;

	it=teststruct.find(order1);

	std::cout<<it->second<<std::endl;

	g<span style="font-family: Arial, Helvetica, sans-serif;">etchar();</span>

}

int main()

{

	testHashMap();

	getchar();

}

假设有不明白的地方。请參考博客：http://blog.csdn.net/sdhongjun/article/details/4517325，这位大神写的比較具体，细致看看。