浅谈c++ vector和map的遍历和删除对象

示例如下：

// 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; //创建一个对象
a.push_back(1);
a.push_back(2);
a.push_back(3);

vector<int>::iterator iter;

for( iter = a.begin(); iter != a.end(); ++iter ) //遍历和删除一个对象
{
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++)//通过new 一个对象删除
{
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;
}

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