forked from Request2609/codeOfPractice
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathfunc.cpp
More file actions
44 lines (40 loc) · 1.07 KB
/
Copy pathfunc.cpp
File metadata and controls
44 lines (40 loc) · 1.07 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
#include <iostream>
using namespace std;
class A {
public:
virtual void vfunc1() { cout << "A::vfunc1()" << endl; };
virtual void vfunc2() { cout << "A::vfunc2()" << endl; };
void func1() { cout << "A::func1()" << endl; };
void func2() { cout << "A::func2()" << endl; };
private:
int data1_;
int data2_;
};
class B :public A {
public:
virtual void vfunc1() override { cout << "B::vfunc1()" << endl; };
void func2() { cout << "B::func2()" << endl; };
private:
int data3_;
};
class C :public B {
public:
virtual void vfunc1() override { cout << "C::vfunc1()" << endl; };
void func2() { cout << "C::func2()" << endl; };
private:
int data1_, data4_;
};
//演示了手动调用虚函数的过程
int main() {
B a;
typedef void(*Fun)(void);
Fun pFun = nullptr;
cout << "虚函数表地址：" << (int*)(&a) << endl;
cout << "虚函数表第1个函数地址："<<(int*)*(int*)(&a) << endl;
cout << "虚函数表第2个函数地址：" << (int*)*(int*)(&a) + 1 << endl;
pFun = (Fun)*((int*)*(int*)(&a));
pFun();
pFun = (Fun)*((int*)*(int*)(&a) + 1);
pFun();
return 0;
}