下列程序时类D代码段出现编译错误，原因是【 】。 include＜iostream. h＞ class A { public:A（char c)

下列程序时类D代码段出现编译错误，原因是【 】。

include＜iostream. h＞

class A

{

public:

A(char c){cout＜＜"A's constructor."＜＜c＜＜endl;}

～A(){cout＜＜"A's destructor."＜＜endl;}

};

class B: virtual public A

{

public:

B(char cb,char cd):A(cb) {cout＜＜"B's constructor."＜＜cd＜＜endl;}

～B(){cout＜＜"B's destructor."＜＜endl;}

private:

char b;

};

class C:virtual public A

{

public:

C(char cc, char cd):A(cc)

{cout＜＜"C's constructor. "＜＜cd＜＜endl;}

～C(){cout＜＜"C's destructor."＜＜endl;}

};

class D:public B,public C

{

public:

D(char cd,char ce,char cf, char cg, char ch,char ci)

:C(cf,cg),B(cd,ce),A(cd),aa(ch)

{cout＜＜"D's constructor."＜＜ci＜＜endl;}

～D() {cout＜＜"D's destructor."＜＜endl;}

private:

A aa;

};

void main()

{

D ohj('a','b','c','d','e','f')

}