第一种:用insert函数插入pair数据
#include <map>
#include <string>
#include <iostream>
using namespace std;
int main(){
map<int,string> mapStudent;
mapStudent.insert(pair<int, string>(1,"student_one"));
mapStudent.insert(pair<int, string>(2,"student_two"));
mapStudent.insert(pair<int, string>(3,"student_three"));
map<int, string>::iterator iter;
for(iter=mapStudent.begin();iter!= mapStudent.end();iter++){
cou......
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