c++类研究（1）普通的c++类

 #include <iostream.h>
class cppclass
{
private:
 int i;
public:
 cppclass();
 void cppout();
};
cppclass::cppclass()
{
 i=5;
}
void cppclass::cppout()
{
 cout<<i;
}
void main()
{
 cppclass a;
 a.cppout();
}

@ILT+0(??0cppclass@@QAE@XZ):
00401005 E9 26 00 00 00       jmp         cppclass::cppclass (00401030)
@ILT+5(?cppout@cppclass@@QAEXXZ):
0040100A E9 61 00 00 00       jmp         cppclass::cppout (00401070)
@ILT+10(_main):
0040100F E9 AC 00 00 00       jmp         main (004010c0)

1:    #include <iostream.h>
2:    class cppclass
3:    {
4:    private:
5:        int i;
6:    public:
7:        cppclass();
8:        void cppout();
9:    };
10:   cppclass::cppclass()
11:   {
00401030 55                   push        ebp
00401031 8B EC                mov         ebp,esp
00401033 83 EC 44             sub         esp,44h
00401036 53                   push        ebx
00401037 56                   push        esi
00401038 57                   push        edi
00401039 51                   push        ecx
0040103A 8D 7D BC             lea         edi,[ebp-44h]
0040103D B9 11 00 00 00       mov         ecx,11h
00401042 B8 CC CC CC CC       mov         eax,0CCCCCCCCh
00401047 F3 AB                rep stos    dword ptr [edi]
00401049 59                   pop         ecx
0040104A 89 4D FC             mov         dword ptr [ebp-4],ecx
12:       i=5;
0040104D 8B 45 FC             mov         eax,dword ptr [ebp-4]
00401050 C7 00 05 00 00 00    mov         dword ptr [eax],5
13:   }
00401056 8B 45 FC             mov         eax,dword ptr [ebp-4]
00401059 5F                   pop         edi
0040105A 5E                   pop         esi
0040105B 5B                   pop         ebx
0040105C 8B E5                mov         esp,ebp
0040105E 5D                   pop         ebp
0040105F C3                   ret

14:   void cppclass::cppout()
15:   {
00401070 55                   push        ebp
00401071 8B EC                mov         ebp,esp
00401073 83 EC 44             sub         esp,44h
00401076 53                   push        ebx
00401077 56                   push        esi
00401078 57                   push        edi
00401079 51                   push        ecx
0040107A 8D 7D BC             lea         edi,[ebp-44h]
0040107D B9 11 00 00 00       mov         ecx,11h
00401082 B8 CC CC CC CC       mov         eax,0CCCCCCCCh
00401087 F3 AB                rep stos    dword ptr [edi]
00401089 59                   pop         ecx
0040108A 89 4D FC             mov         dword ptr [ebp-4],ecx
16:       cout<<i;
0040108D 8B 45 FC             mov         eax,dword ptr [ebp-4]
00401090 8B 08                mov         ecx,dword ptr [eax]
00401092 51                   push        ecx
00401093 B9 C0 89 42 00       mov         ecx,offset cout (004289c0)
00401098 E8 73 00 00 00       call        ostream::operator<< (00401110)
17:   }
0040109D 5F                   pop         edi
0040109E 5E                   pop         esi
0040109F 5B                   pop         ebx
004010A0 83 C4 44             add         esp,44h
004010A3 3B EC                cmp         ebp,esp
004010A5 E8 B6 23 00 00       call        __chkesp (00403460)
004010AA 8B E5                mov         esp,ebp
004010AC 5D                   pop         ebp
004010AD C3                   ret

18:   void main()
19:   {
004010C0 55                   push        ebp
004010C1 8B EC                mov         ebp,esp
004010C3 83 EC 44             sub         esp,44h
004010C6 53                   push        ebx
004010C7 56                   push        esi
004010C8 57                   push        edi
004010C9 8D 7D BC             lea         edi,[ebp-44h]
004010CC B9 11 00 00 00       mov         ecx,11h
004010D1 B8 CC CC CC CC       mov         eax,0CCCCCCCCh
004010D6 F3 AB                rep stos    dword ptr [edi]
20:       cppclass a;
004010D8 8D 4D FC             lea         ecx,[ebp-4]
004010DB E8 25 FF FF FF       call        @ILT+0(cppclass::cppclass) (00401005)
21:       a.cppout();
004010E0 8D 4D FC             lea         ecx,[ebp-4]
004010E3 E8 22 FF FF FF       call        @ILT+5(cppclass::cppout) (0040100a)
22:   }
004010E8 5F                   pop         edi
004010E9 5E                   pop         esi
004010EA 5B                   pop         ebx
004010EB 83 C4 44             add         esp,44h
004010EE 3B EC                cmp         ebp,esp
004010F0 E8 6B 23 00 00       call        __chkesp (00403460)
004010F5 8B E5                mov         esp,ebp
004010F7 5D                   pop         ebp
004010F8 C3                   ret

在main()函数运行时，创建类时跳转到了类的构建函数调用完返回！

通过例子可以看出，函数一直在调用类的成员函数，类在那儿进行初始化？
为此设计这样例子，
00401093 B9 C0 89 42 00       mov         ecx,offset cout (004289c0)
00401098 E8 73 00 00 00       call        ostream::operator<< (00401110)

004010E3 B9 C0 89 42 00       mov         ecx,offset cout (004289c0)
004010E8 E8 23 00 00 00       call        ostream::operator<< (00401110)

可以看到
004289c0 地址是初始化i的地址。