dev-cpp-users

[Dev-C++] Memory leak with STL list erase

[Alessandro B. <al...@vi...>]

Hi,
I tried to use the STL list in order to insert and erase some element, =
but if I look to the memory usage of my program it seems when I erase =
elements the memory occupation it is the same (also if I use clear()).
This code is an example=20

#include <iostream>
#include <list>
#include <cstdlib>

using namespace std;

class prova
{
public:
    int x,y;
    prova(int X, int Y):x(X),y(Y){}
};

int main()
{
    list <prova> lista;
    for (int i=3D0;i<1000000;i++){
        prova *temp=3D new prova(rand()%2,i);
        lista.push_back(*temp);}
    list<prova>::iterator t;
    t=3Dlista.begin();
    while (t!=3Dlista.end())
    {
        if (t->x=3D=3D0)  =20
            t=3Dlista.erase(t);
        else
            t++;
    }
    lista.clear();
    system("PAUSE");
 return 0;
}

Some suggestions?
Thanks in advance:
Alessandro

Re: [Dev-C++] Memory leak with STL list erase

[Mikael L. <cbt...@ma...>]

Alessandro Bugatti wrote:

> Hi,
> I tried to use the STL list in order to insert and erase some element, 
> but if I look to the memory usage of my program it seems when I erase 
> elements the memory occupation it is the same (also if I use clear()).
> 
> [snip] 

Since you create your elements with new, you'll have to call delete on 
them yourself. Either that or use a smart-pointer class.

-Mikael Lax