C++中重载delete操作符

在C++中，重载delete operator的一个非常重要的应用是：当用户重定义了一个new operator，并分配了资源。若在创建时发生异常，则编辑器会自动调用delete operator进行处理。见如下代码示例：

#include <iostream>class C {public:class Bad_create {};C(){std::cout << "C::C() is called !~\n";}C(int ) throw ( Bad_create ){std::cout << "C::C( int ) is called.!~\n";throw Bad_create();}void operator delete( void * p){std::cout << "C::operator delete( void *) is called !~\n";}};void main(char * args[], int argc){try{C *c = new C( 0 );}catch(C::Bad_create &e){}}

运行截图

若在创建时发生异常，则系统会自动调用delete operator进行用户自定义的资源释放操作。