?? mallocclass.cpp
字號:
//: C13:MallocClass.cpp
// From Thinking in C++, 2nd Edition
// Available at http://www.BruceEckel.com
// (c) Bruce Eckel 2000
// Copyright notice in Copyright.txt
// Malloc with class objects
// What you'd have to do if not for "new"
#include "../require.h"
#include <cstdlib> // malloc() & free()
#include <cstring> // memset()
#include <iostream>
using namespace std;
class Obj {
int i, j, k;
enum { sz = 100 };
char buf[sz];
public:
void initialize() { // Can't use constructor
cout << "initializing Obj" << endl;
i = j = k = 0;
memset(buf, 0, sz);
}
void destroy() const { // Can't use destructor
cout << "destroying Obj" << endl;
}
};
int main() {
Obj* obj = (Obj*)malloc(sizeof(Obj));
require(obj != 0);
obj->initialize();
// ... sometime later:
obj->destroy();
free(obj);
} ///:~
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