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p**v
发帖数: 853 | 1 class Wilma { };
class Fred {
public:
Fred() : p_(new Wilma()) { }
Fred(const Fred& f) : p_(new Wilma(*f.p_)) { } //question
~Fred() { delete p_; }
Fred& operator= (const Fred& f)
{
// Bad code: Doesn't handle self-assignment!
delete p_; // Line #1
p_ = new Wilma(*f.p_); // Line #2
return *this;
}
private:
Wilma* p_;
};
上面例子中，不明白在copy constructor (//question 那行)
为什么要用Wilma(*f.p_)，这个*f的用法是什么 | c*****g
发帖数: 119 | 2
Wilma's copy ctor with parameter of const Wilma&
Accessibility control with class, not object
Explained in the previous answer
initialization
【在 p**v 的大作中提到】
: class Wilma { };
: class Fred {
: public:
: Fred() : p_(new Wilma()) { }
: Fred(const Fred& f) : p_(new Wilma(*f.p_)) { } //question
: ~Fred() { delete p_; }
: Fred& operator= (const Fred& f)
: {
: // Bad code: Doesn't handle self-assignment!
: delete p_; // Line #1
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