深入了解C++中map用法

/************************************************************************** Map的特点: 1、存储Key-value对* 2、支持快速查找，查找的复杂度基本是Log(N)* 3、快速插入，快速删除，快速修改记*/************************************************************************/#include <iostream>#include <string>#include <map> using namespace std;int main(){ map<const char*,int> m; m["a"]=1; m["b"]=6; m["c"]=9; map<const char*,int>::iterator it; it=m.begin(); const char* c =it->first; cout<<"first element is :"<<c<<endl; int i = m["c"]; while(it!=m.end()){ cout << it->first<<";"<<it->second<<endl; ++it; } cout <<"m[/"c/"]="<<i<<endl; cout <<"sizeof m:"<<m.size()<<endl; cout <<"erase m[/"c/"](1:succ 0:failed):"<<m.erase("c")<<endl; cout <<"erase m[/"c/"]:"<<m.erase("c")<<endl; cout <<"sizeof m:"<<m.size()<<endl; cout<<"m[c]="<<m["c"]<<endl; cout<<"sizeof m :"<<m.size()<<endl; return 0;}