Brief discussion on c++ vector and map traversing and deleting objects

Here's an example:

// Aa.cpp : Defines the entry point for the console application.

#include "stdafx.h"
#include <vector>
#include <map>
#include <iostream>
using namespace std;

int main(int argc, char* argv[])
{
printf("Hello World!\n");


vector<int> a; // create 1 An object 
a.push_back(1);
a.push_back(2);
a.push_back(3);

vector<int>::iterator iter;

for( iter = a.begin(); iter != a.end(); ++iter ) // Traverse and delete 1 An object 
{
if( (*iter) == 2 )
{
a.erase(iter);
printf("del is item;");
break;
}
}

vector<int>* b = new vector<int>();
b->push_back(1);
b->push_back(2);
b->push_back(3);

vector<int>::iterator iterr;

for( iterr = b->begin() ; iterr!= b->end() ; iterr++)// through new 1 Object deletion 
{
if( (*iterr) == 2 )
{
b->erase(iterr);
printf("del is new item");
break;
}
}

map<int,int> mapTest;
mapTest[0] = 1;
mapTest[1] = 2;
mapTest[2] = 3;

map<int,int>::iterator mapIter;

for( mapIter = mapTest.begin() ; mapIter != mapTest.end() ; ++mapIter )
{
std::cout << mapIter->first<<"-----"<<mapIter->second<< std::endl;
}

system("pause");


return 0;
}