?? badvoidpointerdeletion.cpp
字號:
//: C13:BadVoidPointerDeletion.cpp
// From Thinking in C++, 2nd Edition
// Available at http://www.BruceEckel.com
// (c) Bruce Eckel 2000
// Copyright notice in Copyright.txt
// Deleting void pointers can cause memory leaks
#include <iostream>
using namespace std;
class Object {
void* data; // Some storage
const int size;
const char id;
public:
Object(int sz, char c) : size(sz), id(c) {
data = new char[size];
cout << "Constructing object " << id
<< ", size = " << size << endl;
}
~Object() {
cout << "Destructing object " << id << endl;
delete []data; // OK, just releases storage,
// no destructor calls are necessary
}
};
int main() {
Object* a = new Object(40, 'a');
delete a;
void* b = new Object(40, 'b');
delete b;
} ///:~
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