27.cpp

#include <iostream>
#include <cstdlib>
#include <new>
using namespace std;
class loc {
    int longitude, latitude;
    public:
    loc() {}
    loc(int lg, int lt) {
        longitude = lg;
        latitude = lt;
    }
    void show() {
        cout << longitude << " ";
        cout << latitude << "\n";
    }
};
// Global new	***NOT RECOMMENDED***
void *operator new(size_t size)
{
    void *p;
    cout << "Overloaded global new " << endl;

    p = malloc(size);
    if(!p) {
        bad_alloc ba;
        throw ba;
    }
    return p;
}

// Global delete	***NOT RECOMMENDED***  
void operator delete(void *p)
{
	cout << "Overloaded global delete" << endl;
    free(p);
}

int main()
{
    loc *p1, *p2;
    float *f;

    try {
        p1 = new loc (10, 20);
    } catch (bad_alloc xa) {
        cout << "Allocation error for p1.\n";
        return 1;
    }

    try {
        p2 = new loc (-10, -20);
    } catch (bad_alloc xa) {
        cout << "Allocation error for p2.\n";
        return 1;
    }

    try {
        f = new float; // uses overloaded new, too
    } catch (bad_alloc xa) {
        cout << "Allocation error for f.\n";
        return 1;
    }
    *f = 10.10F;
    cout << *f << "\n";
    p1->show();
    p2->show();
    delete p1;
    delete p2;
    delete f;
    return 0;
}