remove刪除容器元素時需要注意的事項

remove在刪除內存中某元素的時候，該元素對應的內存不會被刪除，該內存會被該元素後面的數據填充，也就是說如果要刪除該內存，需要和
erase配合使用，距離：

#include
#include
#include
#include

using namespace std;

int main()
{
list coll;
for(int i = 0;i<=6;i++)
{
coll.push_front(i);
coll.push_back(i);
}
copy(coll.cbegin(),coll.cend(),ostream_iterator(cout," “));
std::cout<<endl;
list::iterator end = remove(coll.begin(),coll.end(),3);
std::cout<<“post”;
copy(coll.cbegin(),end,ostream_iterator(cout,” "));
std::cout<<endl;
std::cout<<"number of removed elements: "<<distance(end,coll.end())<<endl;

coll.erase(end,coll.end());
copy(coll.cbegin(),coll.cend(),ostream_iterator<int>(cout," "));
cout<<endl;

}