Mega Code Archive
Overloading new and delete
<![CDATA[
#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";
}
void *operator new(size_t size);
void operator delete(void *p);
};
// new overloaded relative to loc.
void *loc::operator new(size_t size)
{
void *p;
cout << "In overloaded new.\n";
p = malloc(size);
if(!p) {
bad_alloc ba;
throw ba;
}
return p;
}
// delete overloaded relative to loc.
void loc::operator delete(void *p)
{
cout << "In overloaded delete.\n";
free(p);
}
int main()
{
loc *p1, *p2;
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;;
}
p1->show();
p2->show();
delete p1;
delete p2;
return 0;
}
]]>