C++ Map

#include<stdio.h>
#include<iostream>
#include<iterator>
#include<map>
using namespace std;
int main()
{
    map <string,int> m;
    map <string, int> :: iterator it;

    m["Anik"] = 43;
    m["Sourav"] = 44;
    m["Soad"] = 45;
    m["Shawon"] = 46;

    m.insert(make_pair("Anik Das", 75));

    printf("%d ", m["Anik Das"]);

    it = m.begin();

    cout << it ->first << " " << it ->second << endl << endl;

    for(it=m.begin();it != m.end();it++)
    {
        cout << it ->first << "------>" << it ->second << endl;
    }
    cout << endl;

    return 0;
}