#include <iostream>
 
using namespace std;
 
class Base
{
public:
    virtual void Method() = 0 { n = 1; }
private:
    int n;
};
 
class D1 :Base {};
 
class D2 :public D1
{
    int i;
    void Method() { i = 2; }
};
int main()
{
    D2 test;
    return 0;
}

 

Câu hỏi liên quan

• What will be output of the program?

• Size of short integer and long integer can be verified using the sizeof( ) operator

•  Which of the following correctly shows the hierarchy of arithmetic operator in C?

ZUNIA12

• In which stage the following code. Gets replaced by the contents of the file stdio.h

• One cannot use enumerations in a class.

• What gets printed?

• Trong cấu trúc chương trình C++, lệnh #include dùng để làm gì?

• Point out a error in the following program

• Static member functions can access only the ___ data members of a class.

• Kết quả đoạn lệnh sau là bao nhiêu? 

• What will be the output of the program?

• What is output?

• A function cannot be defined inside another function

• What is output ?

• Hàm overloaded là những hàm như thế nào?

• Which of the following is not user define data type?

• If return type for a function is not specified, it defaults to int

• In C++, only one catch block can handle all the exceptions.

• Which of the following statements are correct about an array?

  1. The array int num[26]; can store 26 elements
  2. The expression num[1] designates the very first element in the array
  3. It is necessary to initialize the array at the time of declaration.
  4. The declaration num[SIZE] is allowed if SIZE is a macro.

• hich of the following is the correct order of evaluation for the below expression? z = x + y * z / 4 % 2 – 1;