Write a class named Accumulator containing: An instance variable named sum of type integer. A constructor that accepts an integer parameter, whose value is used to initialize the sum instance variable. A method named getSum that returns the value of sum. A method named add that accepts an integer parameter. The value of sum is increased by the value of the parameter.

The following are the code in the C+ + Programming Language.

//define header file

#include

/ / using namespace

using namespace std;

//define a class

class Accumulator

{

//set private access modifier

private:

//declare integer type variable

int sum;

//set public access modifier

public:

//define constructor

Accumulator (int sum)

{

//refer the same class as instance variable

this->sum = sum;

}

//define integer type function

int getSum ()

{

//return the value of sum

return sum;

}

//define void type function

void add (int value)

{

//variable sum is increased by the argument value

sum + = value;

}

};

Explanation:

The following are the description of the code.

Firstly, set the required header file and namespace then, define a class 'Accumulator' and inside the class. Set private access modifier then, declare an integer data type variable 'sum'. Declare a class constructor whose name is the same as the class name 'Accumulator () ' and pass integer data type argument 'sum' in its parameter that refers to the same class as instance variable. Define a integer data type function 'getSum () ' that return the value of the variable sum. Finally, define a void type function 'add () ' and pass the integer data type argument 'value' in its parameter in which the variable sum is increased by the argument value.