#include<iostream>
#include<map>
#include <stdio.h>
using namespace std;

int main()
{

    std::map<int, int> a;
    std::map<int, int> b;
    a.insert(std::make_pair(1, 3));
    a.insert(std::make_pair(5, 3));

    //b.insert(std::make_pair(10, 3)); //不會被儲存
    b = a; //覆蓋操作
    b.insert(std::make_pair(10, 3));

    for(std::map<int, int>::iterator it = b.begin();  it != b.end(); ++it)
    {
        printf("%d == %u\n", it->first, it->second);
    }
    return 0;
}