Beginning C++ Through Gam…rogramming (2nd Edition)/BCGP2E.ISO/source/chapter09/heap.cpp

C/C++ Source or Header | 2006-10-25 | 929 b | 52 lines

// Heap
// Demonstrates dynamically allocating memory

#include <iostream>

using namespace std;

int* intOnHeap();  //returns an int on the heap
void leak1();      //creates a memory leak
void leak2();      //creates another memory leak

int main()
{
    int* pHeap = new int;
    *pHeap = 10;
    cout << "*pHeap: " << *pHeap << "\n\n";

    int* pHeap2 = intOnHeap();
    cout << "*pHeap2: " << *pHeap2 << "\n\n";

    cout << "Freeing memory pointed to by pHeap.\n\n";
    delete pHeap;

    cout << "Freeing memory pointed to by pHeap2.\n\n";
    delete pHeap2;

    //get rid of dangling pointers
    pHeap = 0;
    pHeap2 = 0;

    return 0;
}

int* intOnHeap()
{
    int* pTemp = new int(20);
    return pTemp;
}

void leak1()
{
    int* drip1 = new int(30);
}

void leak2()
{
    int* drip2 = new int(50);
    drip2 = new int(100);
    delete drip2;
}