STL模板库map

#include<stdio.h>#include<stdlib.h>#include<map>#include<string>#include<algorithm>using namespace std;map<char,char>s1;map<string,int>s2;map<string,string>s3;int main(){    s1['a']='c';    //s1.clear();//清空s1    s2["dgfdhf"]=14;    s3["dfdfdff"]="zsfsf";    printf("s1['a'] = %c\n",s1['a']);    printf("s2[\"dgfdhf\"] = %d\n",s2["dgfdhf"]);//\是转义字符，为了标识他是一个字符    printf("s3[\"dfdfdff\"] = %s\n",s3["dfdfdff"].c_str());//当map中值为string时要加.c_str();    return 0;}