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Light-City
2020-04-06 00:57:02 +08:00
parent f97c156cc4
commit a4d828bb4c
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21
practical_exercises/10_day_practice/day5/虚拟继承/readme.md Normal file
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practical_exercises/10_day_practice/day5/虚拟继承/例1.cpp Normal file
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#include<iostream>
using namespace std;
class A {
public:
void vf() {
cout<<"I come from class A"<<endl; }
};
class B: public A{};
class C: public A{};
class D: public B, public C{};
int main()
{
D d;
d.vf (); // error
system("pause");
return 0;
}

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practical_exercises/10_day_practice/day5/虚拟继承/例2.cpp Normal file
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#include<iostream>
using namespace std;
class A {
public:
void vf() {
cout<<"I come from class A"<<endl; }
};
class B: virtual public A{};
class C: virtual public A{};
class D: public B, public C{};
int main()
{
D d;
d.vf (); // okay
system("pause");
return 0;
}

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practical_exercises/10_day_practice/day5/虚拟继承/派生类初始化.cpp Normal file
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#include <iostream>
using namespace std;
class A {
int a;
public:
A(int x) {
a=x;
cout<<"Virtual Bass A..."<<endl;
}
};
class B:virtual public A {
public:
B(int i):A(i){ cout<<"Virtual Bass B..."<<endl; }
};
class C:virtual public A{
int x;
public:
C(int i):A(i){
cout<<"Constructing C..."<<endl;
x=i;
}
};
class ABC:public C, public B {
public:
//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><CABC>
ABC(int i,int j,int k):C(i),B(j),A(i) //L1<4C><31><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>A<EFBFBD><41><EFBFBD>г<EFBFBD>ʼ<EFBFBD><CABC>
{ cout<<"Constructing ABC..."<<endl; }
};
int main(){
ABC obj(1,2,3);
system("pause");
return 0;
}

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practical_exercises/10_day_practice/day5/虚拟继承/虚基类调用次序(重要).cpp Normal file
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//<2F><>Ҫ!!!
#include <iostream>
using namespace std;
class A {
int a;
public:
A(){ cout<<"Constructing A"<<endl; }
};
class B {
public:
B(){ cout<<"Constructing B"<<endl;}
};
class B1:virtual public B ,virtual public A{
public:
B1(int i){ cout<<"Constructing B1"<<endl; }
};
class B2:public A,virtual public B {
public:
B2(int j){ cout<<"Constructing B2"<<endl; }
};
class D: public B1, public B2 {
public:
D(int m,int n): B1(m),B2(n){ cout<<"Constructing D"<<endl; }
A a;
};
int main(){
D d(1,2);
system("pause");
return 0;
}