Chapter 3, Problem 3.5E

Question

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Answer 1

Question

Chapter 3, Problem 3.5E

Expert Solution & Answer

To determine

Program Plan:

Default Constructor:

Constructor is the first function which is automatically called by the compiler when object is created. Its main purpose is make initializations for the class. Default constructors are the one which take no arguments or parameters, and even if they have parameters, they have default value. By default value we mean initial blank value which variable can take.

Syntax

Classname();
Classname(datatype=default value);

Example

Let us see following example:

#include<iostream>
using namespace std;
class A
{
     int x;
     float y;
public:
     A(){};				// default constructor
     void disp()
    {
            cout<<"\nx = "<<x;
            cout<<"\ny = "<<y;
     }
};

int main()
{
A a;				// making object of class A
a.disp();			// call to disp() function 
}

Explanation of Solution

C++ How to Program (Early Objects Version), Chapter 3, Problem 3.5E , additional homework tip 1

A(){} is the default constructor which initialize the variable x and y with default value 0 as evident from the output.

If user does not define any default constructor then compiler itself perform the same working, by automatically initializing the variable of the class on object creation.
Example:

#include<iostream>
using namespace std;
class A
{
    int x;
    float y;
public:
    void disp()
    {
        cout<<"\nx = "<<x;
        cout<<"\ny = "<<y;
    }
};

int main()
{
A a;
a.disp();
}

C++ How to Program (Early Objects Version), Chapter 3, Problem 3.5E , additional homework tip 2

Above piece of code does not have default constructor, but when object is created for class A, its data members are automatically initialized to value 0. Thus its quite evident that even if we do not create any default constructor, complier itself will initialize every data member.

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Answer 2

Question

Chapter 3, Problem 3.5E

Expert Solution & Answer

To determine

Program Plan:

Default Constructor:

Constructor is the first function which is automatically called by the compiler when object is created. Its main purpose is make initializations for the class. Default constructors are the one which take no arguments or parameters, and even if they have parameters, they have default value. By default value we mean initial blank value which variable can take.

Syntax

Classname();
Classname(datatype=default value);

Example

Let us see following example:

#include<iostream>
using namespace std;
class A
{
     int x;
     float y;
public:
     A(){};				// default constructor
     void disp()
    {
            cout<<"\nx = "<<x;
            cout<<"\ny = "<<y;
     }
};

int main()
{
A a;				// making object of class A
a.disp();			// call to disp() function 
}

Explanation of Solution

C++ How to Program (Early Objects Version), Chapter 3, Problem 3.5E , additional homework tip 1

A(){} is the default constructor which initialize the variable x and y with default value 0 as evident from the output.

If user does not define any default constructor then compiler itself perform the same working, by automatically initializing the variable of the class on object creation.
Example:

#include<iostream>
using namespace std;
class A
{
    int x;
    float y;
public:
    void disp()
    {
        cout<<"\nx = "<<x;
        cout<<"\ny = "<<y;
    }
};

int main()
{
A a;
a.disp();
}

C++ How to Program (Early Objects Version), Chapter 3, Problem 3.5E , additional homework tip 2

Above piece of code does not have default constructor, but when object is created for class A, its data members are automatically initialized to value 0. Thus its quite evident that even if we do not create any default constructor, complier itself will initialize every data member.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 3

Question

Chapter 3, Problem 3.5E

Expert Solution & Answer

To determine

Program Plan:

Default Constructor:

Constructor is the first function which is automatically called by the compiler when object is created. Its main purpose is make initializations for the class. Default constructors are the one which take no arguments or parameters, and even if they have parameters, they have default value. By default value we mean initial blank value which variable can take.

Syntax

Classname();
Classname(datatype=default value);

Example

Let us see following example:

#include<iostream>
using namespace std;
class A
{
     int x;
     float y;
public:
     A(){};				// default constructor
     void disp()
    {
            cout<<"\nx = "<<x;
            cout<<"\ny = "<<y;
     }
};

int main()
{
A a;				// making object of class A
a.disp();			// call to disp() function 
}

Explanation of Solution

C++ How to Program (Early Objects Version), Chapter 3, Problem 3.5E , additional homework tip 1

A(){} is the default constructor which initialize the variable x and y with default value 0 as evident from the output.

If user does not define any default constructor then compiler itself perform the same working, by automatically initializing the variable of the class on object creation.
Example:

#include<iostream>
using namespace std;
class A
{
    int x;
    float y;
public:
    void disp()
    {
        cout<<"\nx = "<<x;
        cout<<"\ny = "<<y;
    }
};

int main()
{
A a;
a.disp();
}

C++ How to Program (Early Objects Version), Chapter 3, Problem 3.5E , additional homework tip 2

Above piece of code does not have default constructor, but when object is created for class A, its data members are automatically initialized to value 0. Thus its quite evident that even if we do not create any default constructor, complier itself will initialize every data member.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 4

Question

Chapter 3, Problem 3.5E

Expert Solution & Answer

To determine

Program Plan:

Default Constructor:

Constructor is the first function which is automatically called by the compiler when object is created. Its main purpose is make initializations for the class. Default constructors are the one which take no arguments or parameters, and even if they have parameters, they have default value. By default value we mean initial blank value which variable can take.

Syntax

Classname();
Classname(datatype=default value);

Example

Let us see following example:

#include<iostream>
using namespace std;
class A
{
     int x;
     float y;
public:
     A(){};				// default constructor
     void disp()
    {
            cout<<"\nx = "<<x;
            cout<<"\ny = "<<y;
     }
};

int main()
{
A a;				// making object of class A
a.disp();			// call to disp() function 
}

Explanation of Solution

C++ How to Program (Early Objects Version), Chapter 3, Problem 3.5E , additional homework tip 1

A(){} is the default constructor which initialize the variable x and y with default value 0 as evident from the output.

If user does not define any default constructor then compiler itself perform the same working, by automatically initializing the variable of the class on object creation.
Example:

#include<iostream>
using namespace std;
class A
{
    int x;
    float y;
public:
    void disp()
    {
        cout<<"\nx = "<<x;
        cout<<"\ny = "<<y;
    }
};

int main()
{
A a;
a.disp();
}

C++ How to Program (Early Objects Version), Chapter 3, Problem 3.5E , additional homework tip 2

Above piece of code does not have default constructor, but when object is created for class A, its data members are automatically initialized to value 0. Thus its quite evident that even if we do not create any default constructor, complier itself will initialize every data member.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 5

Expert Solution & Answer

To determine

Program Plan:

Default Constructor:

Constructor is the first function which is automatically called by the compiler when object is created. Its main purpose is make initializations for the class. Default constructors are the one which take no arguments or parameters, and even if they have parameters, they have default value. By default value we mean initial blank value which variable can take.

Syntax

Classname();
Classname(datatype=default value);

Example

Let us see following example:

#include<iostream>
using namespace std;
class A
{
     int x;
     float y;
public:
     A(){};				// default constructor
     void disp()
    {
            cout<<"\nx = "<<x;
            cout<<"\ny = "<<y;
     }
};

int main()
{
A a;				// making object of class A
a.disp();			// call to disp() function 
}

Explanation of Solution

C++ How to Program (Early Objects Version), Chapter 3, Problem 3.5E , additional homework tip 1

A(){} is the default constructor which initialize the variable x and y with default value 0 as evident from the output.

If user does not define any default constructor then compiler itself perform the same working, by automatically initializing the variable of the class on object creation.
Example:

#include<iostream>
using namespace std;
class A
{
    int x;
    float y;
public:
    void disp()
    {
        cout<<"\nx = "<<x;
        cout<<"\ny = "<<y;
    }
};

int main()
{
A a;
a.disp();
}

C++ How to Program (Early Objects Version), Chapter 3, Problem 3.5E , additional homework tip 2

Above piece of code does not have default constructor, but when object is created for class A, its data members are automatically initialized to value 0. Thus its quite evident that even if we do not create any default constructor, complier itself will initialize every data member.

Answer 6

Expert Solution & Answer

To determine

Program Plan:

Default Constructor:

Constructor is the first function which is automatically called by the compiler when object is created. Its main purpose is make initializations for the class. Default constructors are the one which take no arguments or parameters, and even if they have parameters, they have default value. By default value we mean initial blank value which variable can take.

Syntax

Classname();
Classname(datatype=default value);

Example

Let us see following example:

#include<iostream>
using namespace std;
class A
{
     int x;
     float y;
public:
     A(){};				// default constructor
     void disp()
    {
            cout<<"\nx = "<<x;
            cout<<"\ny = "<<y;
     }
};

int main()
{
A a;				// making object of class A
a.disp();			// call to disp() function 
}

Explanation of Solution

C++ How to Program (Early Objects Version), Chapter 3, Problem 3.5E , additional homework tip 1

A(){} is the default constructor which initialize the variable x and y with default value 0 as evident from the output.

If user does not define any default constructor then compiler itself perform the same working, by automatically initializing the variable of the class on object creation.
Example:

#include<iostream>
using namespace std;
class A
{
    int x;
    float y;
public:
    void disp()
    {
        cout<<"\nx = "<<x;
        cout<<"\ny = "<<y;
    }
};

int main()
{
A a;
a.disp();
}

C++ How to Program (Early Objects Version), Chapter 3, Problem 3.5E , additional homework tip 2

Above piece of code does not have default constructor, but when object is created for class A, its data members are automatically initialized to value 0. Thus its quite evident that even if we do not create any default constructor, complier itself will initialize every data member.

Answer 7

Expert Solution & Answer

Answer 8

Expert Solution & Answer

Answer 9

To determine

Program Plan:

Default Constructor:

Constructor is the first function which is automatically called by the compiler when object is created. Its main purpose is make initializations for the class. Default constructors are the one which take no arguments or parameters, and even if they have parameters, they have default value. By default value we mean initial blank value which variable can take.

Syntax

Classname();
Classname(datatype=default value);

Example

Let us see following example:

#include<iostream>
using namespace std;
class A
{
     int x;
     float y;
public:
     A(){};				// default constructor
     void disp()
    {
            cout<<"\nx = "<<x;
            cout<<"\ny = "<<y;
     }
};

int main()
{
A a;				// making object of class A
a.disp();			// call to disp() function 
}

Answer 10

Explanation of Solution

C++ How to Program (Early Objects Version), Chapter 3, Problem 3.5E , additional homework tip 1

A(){} is the default constructor which initialize the variable x and y with default value 0 as evident from the output.

If user does not define any default constructor then compiler itself perform the same working, by automatically initializing the variable of the class on object creation.
Example:

#include<iostream>
using namespace std;
class A
{
    int x;
    float y;
public:
    void disp()
    {
        cout<<"\nx = "<<x;
        cout<<"\ny = "<<y;
    }
};

int main()
{
A a;
a.disp();
}

C++ How to Program (Early Objects Version), Chapter 3, Problem 3.5E , additional homework tip 2

Above piece of code does not have default constructor, but when object is created for class A, its data members are automatically initialized to value 0. Thus its quite evident that even if we do not create any default constructor, complier itself will initialize every data member.

Answer 11

Chapter 3, Problem 3.5E Chapter 3, Problem 3.6E Chapter 3, Problem 3.7E Chapter 3, Problem 3.8E Chapter 3, Problem 3.9E Chapter 3, Problem 3.10E Chapter 3, Problem 3.11E Chapter 3, Problem 3.12E Chapter 3, Problem 3.13E Chapter 3, Problem 3.14E

Chapter 3, Problem 3.5E

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