STL在迭代的过程，删除指定的元素

#include <iostream>
#include <list>

using namespace std;

// STL在迭代的过程中，删除指定的元素
int main()
{
list<int> listTest;

listTest.push_back(-1);
listTest.push_back(-1);
listTest.push_back(-1);
listTest.push_back(-1);

cout<<"list size: "<<listTest.size()<<endl;

list<int>::iterator itList;

for (itList=listTest.begin(); itList != listTest.end(); /*no itList++ !!*/ )
{
cout<<"data: "<<*itList<<endl;

// 第一种方法
if (*itList <= 0)
itList = listTest.erase(itList);
else
++itList;
}
cout<<"list size: "<<listTest.size()<<endl;
cout<<"======================================"<<endl;

listTest.push_back(-1);
listTest.push_back(-1);
listTest.push_back(-1);
listTest.push_back(1);

cout<<"list size: "<<listTest.size()<<endl;

for (itList=listTest.begin(); itList != listTest.end(); ++itList)
{
cout<<"data: "<<*itList<<endl;

// 另外一种方法
if (*itList <= 0)
*itList = 0;		// 做个记录标志。等待迭代完进行回收
}

listTest.remove(0);			// 回收 0

cout<<"list size: "<<listTest.size()<<endl;
cout<<"======================================"<<endl;

return 0;

}