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which func will be called?

which func will be called?# Programming - 葵花宝典

s*i2006-02-20 08:02

1 楼

Suppose I have the following class:
class test{
public:
void func() const
{
cout<}
void func()
{
cout<}
};
when A is an object of test.
What will A.func() give me?
My test says always the "hello,func" but I don't know why.
Thanks

P*x2006-02-20 08:02

2 楼

what if you reverse the sequence of definition?
I guess this is compiler specific. Your object is
not changed in either case and the declaration of
the second one is wrong.

【在 s**i 的大作中提到】

: Suppose I have the following class:
: class test{
: public:
: void func() const
: {
: cout<: }
: void func()
: {
: cout<

K*n2006-02-20 08:02

3 楼

when a member function is called, "this" pointer is implicitly passed as
argument.It is part of function signature. Therefore
void func() const;//say "*this" will not be changed.
void func(); //"*this" may or may not be changed.
void main()
{
test a;
a.func(); //call void func();
((const A)a).func(); //call void func() const;
(*(const A *)&a).func(); //call void func() const;
}

【在 s**i 的大作中提到】

: Suppose I have the following class:
: class test{
: public:
: void func() const
: {
: cout<: }
: void func()
: {
: cout<