map创建

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map<int,string>map

初始化列表

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map<int,string>map2={

​	{1,"Alice"},

​	{2,"Bob"},

​	{3,"Charlie"}

};

map插入

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map<int,string>studentMap;

//使用下列操作符（如果键存在则修改，不存在则插入）

studentMap[103]="mike";

studentMap[104]="Sarah";

访问元素

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map<int,string>studentMap={

​	{101,"Tom"},

​	{102,"jerry"},

​	{103,"Mike"}

};

//1.使用下标操作符{如果键不存在会创新}

cout<<studentMap[101]<<endl;//输出：Tom

遍历map

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map<int,string>studentMap={

​	{101,"Tom"},

​	{102,"jerry"},

​	{103,"Mike"}

};

//1.使用迭代器

cout<<"使用迭代器遍历："<<endl;

fbr(auto it=studentMap.begin();it!=studentMap.end();++it){

cout<<"ID:"<<it->first<<",Name:"<<it->second<<endl;}