Question

Write the interface (.h file) of a class Accumulator containing:
A data member named sum of type integer.
A constructor accepting an integer parameter.
A function named getSum that accepts no parameters and returns an integer.
A function named add that accepts an integer parameter and returns no value.

class Accumulator
{
int sum;
Accumulator(int);
int getSum ();
void add (int);
};



Write the implementation (.cpp file) of the Accumulator class of the previous exercise. The full specification of the class is:
An data member named sum of type integer.
A constructor that accepts an integer parameter. THe constructor initializes the data member sum to the value of the parameter.
A function named getSum that accepts no parameters and returns an integer. getSum returns the value of sum .
A function named add that accepts an integer parameter and returns no value. add increases the value of sum by the value of the parameter.


Accumulator::Accumulator(int ? )
{sum= ?;}

int Accumulator::getSum()
{return sum;}

void Accumulator::add(int ?)
{sum+= ? ;}

Answer 1

Dear,

Here is the code

#ifndef ACCUMULATOR_H
#define ACCUMULATOR_H
class Accumulator
{
int sum;
public: Accumulator(int);
int getSum ();
void add (int);
};
#endif

#include "Accumulator.h
Accumulator:: Accumulator(int num)
{
sum=num;
}
void Accumulator::add(int num)
{
sum+= num ;
}
int Accumulator::getSum()
{
return sum;
}
//Test program
void main()
{
Accumulator obj(5);
obj.add(3);
cout<< "Sum:"<< obj.getSum() << endl;
//pause system for a while
system("pause");
}//end main



Hope this will help you..

Answer 2

Program Screenshots:

//Accumulator.h #ifndef ACCUMULATOR H #define ACCUMULATOR. H // declare a class. class Accumulator // declare private class members. private: int sum; // declare public members. public Accumulator(int sum); int getSum(); void add (int num); 1; #end if // main.cpp #1 nclude #include "Accumulator"h" using namespace std; Accumulator: :Accumulator(int sum) // Initialize the variable sume; // Declare the function add void Accumulator: :add (int num) // Update the value of sum. sum num; // declare the function int Accumulator: :getSum() // return the value of sum return sum;

int main() Declare the object of the class Accumulator obj = NULL; // call to the function add obj.add(3); // Display the output cout << "Sum:" << obj.getsum() << endl; // .

Sample output:

Sum:3

Code to Copy:

//Accumulator.h

#ifndef ACCUMULATOR_H

#define ACCUMULATOR_H

// declare a class.

class Accumulator

{

       // declare private class members.

private:

       int sum;

       // declare public members.

public:

       Accumulator(int sum);

       int getSum();

       void add(int num);

};

#endif

// main.cpp

#include

#include "Accumulator.h"

using namespace std;

Accumulator::Accumulator(int sum)

{

       // Initialize the variable.

       sum = 0;

}

// Declare the function add.

void Accumulator::add(int num)

{

       // Update the value of sum.

       sum += num;

}

// declare the function.

int Accumulator::getSum()

{

       // return the value of sum.

       return sum;

}

int main()

{

       // Declare the object of the class.

       Accumulator obj = NULL;

       // call to the function add.

       obj.add(3);

       // Display the output

       cout << "Sum:" << obj.getSum() << endl;

}

Answer 3

Accumulator.h

class Accumulator{

              private:

                             int sum;

              public:

                             Accumulator();

                             int getSum();

                             void add(int x);

};