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Constructors and Destructors

What will be the output of the following program?

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Practice Constructors and Destructors –

What will be the output of the following program?

#include  

struct Crackexams {    

  int arr[5];      

  public:     

    void TryFunction(void);  

    void Display(void); 

}; 

void Crackexams::Display(void) {  

  for(int i = 0; i < 5; i++) { 

    cout<< arr[i] << " " ; 

  }

} 

void Crackexams::TryFunction(void) {  

  static int i = 0, j = 4;   

  int tmp = arr[i];    

  arr[i]  = arr[j];  

  arr[j]  = tmp   ; 

  i++;    

  j--;  

  if(j != i) {

    TryFunction();

  } 

}

int main() {    

  Crackexams objTry = {{ 5, 6, 3, 9, 0 }};

  objTry.TryFunction(); 

  objTry.Display();    

  return 0; 

}

Which of the following statement is correct about the program given

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Practice Constructors and Destructors –

Which of the following statement is correct about the program given below?

#include 

class Crackexams {  

  int x;     

  float y;    

  public:     

    Crackexams(int x) {   

      x = x;   

    }    

    Crackexams(int p = 0, int q = 10) { 

      x = p += 2;     

      y = q * 1.0f;  

    }   

    void SetValue(int &y, float z) { 

      x = y; 

      y = (int)z;    

    }    

    void Display(void) {   

      cout<< x;    

    } 

}; 

int main() {  

  int val = 12; 

  Crackexams objCrackexams(val);

  Crackexams objTmp();  

  objCrackexams.SetValue(val, 3.14f);   

  objCrackexams.Display();  

  return 0; 

}

What will be the output of the following program?

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Practice Constructors and Destructors –

What will be the output of the following program?

#include 

struct CrackexamsArray {  

  int arr[5];    

  public:    

    void CrackexamsFunction();   

    void Display(); 

}; 

void CrackexamsArray::CrackexamsFunction() {    

  static int i = 0, j = 4; 

  i++;   

  j--;  

  if(j > 0) { 

    CrackexamsFunction(); 

  } 

  int tmp = arr[i]; 

  arr[i]  = arr[j]; 

  arr[j]  = tmp;    

  i--; 

  j++; 

}

void CrackexamsArray::Display() {  

  for(int i = 0; i < 5; i++){  

    cout<< arr[i] << " ";

  } 

}  

int main() {  

  CrackexamsArray objArr = {{5, 6, 3, 9, 0}};

  objArr.CrackexamsFunction();

  objArr.Display();  

  return 0; 

}

Predict the output of following program.


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Practice Constructors and Destructors –

Predict the output of following program.

#include 

using namespace std;

class A

{

protected:

    int x;

public:

    A() {x = 0;}

    friend void show();

};

 

class B: public A

{

public:

    B() : y (0) {}

private:

    int y;

};

 

void show()

{

    A a;

    B b;

    cout << "The default value of A::x = " << a.x << " ";

    cout << "The default value of B::y = " << b.y;

}
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