See C + + (class structure, deconstruction) with Assembly vision

Turn from: http://blog.csdn.net/feixiaoxing/article/details/6769663

We discussed the content of basically C language, and haven't really touched on C + + related knowledge. After this blog, we will touch on the content of the class more. Class has a lot of properties, today we are talking about constructors, destructors.

(1) If there is no constructor, destructor.

View Plain class Apple {public:void print () const {return;} };

Although this class doesn't make sense, we find that it still takes up a byte if we use sizeof to calculate the size. So what if there's an Apple variable? To make Apple's variables meaningful, we try to make a difference:

View Plain 66:apple A;   67:a.print ();   00401248 Lea Ecx,[ebp-4] 0040124B call @ILT +0 (Apple::p rint) (00401005) 68:return; 69: We see that the stack allocates four bytes of space to a, which is a byte below the EBP.

(2) When the destructor is invoked.

View Plain class Apple {public:apple () {printf ("Apple ()!\n");}       ~apple () {printf ("~apple ()!\n");} void print () const {return;}