This is a C++Programming question

Make a Module for a Mark to encapsulate a mark between 0 and 100.

Mark Grade Scale 4 mark

0 =< Mark < 50 F 0.0

50 <= Mark < 60 D 1.0

60 <= Mark < 70 C 2.0

70 <= Mark < 80 B 3.0

80 <= Mark <= 100 A 4.0

The class nam

Important: No values are allowed to be kept in mark out of the range of 0 to 100. In any circumstance and during any function if the value goes below 0 or above 100, the mark is set to an invalid empty state. This condition will not be repeated in during the workshop and applies to all the functions and operators of class Marke must be Mark.

Construction

Mark can be created using on integer value (one argument constructor)that sets the value of the mark. If this value is not provided (no argument constructor), the value of the mark will be zero.

Mark m, n(25), k(200), p(-10);

// value of m is 0

// value of n is 25

// k is invalid

// p is invalid

Operator and conversion overloads

Mark can be casted to the an integer (int type). The result would be the value of the mark or zero if the mark is in an invalid state.

Mark m, n(25), k(200), p(-10);

cout << int(m) << endl;

cout << int(n) << endl;

cout << int(k) << endl;

cout << int(p) << endl;

Ouptut:

0

25

0

0

An integer can be added to the value of the mark using += operator; if the mark is invalid, the action is omitted. Reference of the mark is returned after the operation.

Mark m, n(25), k(200);

cout << int(m += 20) << endl;

cout << int(n += 20) << endl;

cout << int(k += 20) << endl;

cout << int(n += 60) << endl;

Output:

20

45

0

0

Mark can be set to an integer using the assignment operator. If the mark is in an invalid state, the invalid value can be corrected by the assignment.Reference of the mark is returned after the operation.

Mark m, n(25), k(200);

cout << int(m = 80) << endl;

cout << int(n = 120) << endl;

cout << int(k = 70) << endl;

Output:

80

0

70

Mark can be casted to a double, the result would be the GPA equivalent of the integer value. See the table of mark values above. Casting an invalid mark will result a zero value.

Mark m(50), n(80), k(120);

cout << double(m) << endl;

cout << double(n) << endl;

cout << double(k) << endl;

Output:

1

4

0

Mark can be casted to a character (char type), the result would be the grade letter value of the mark. See the table of mark values above. Casting an invalid mark will result a 'X' value.

Mark m(50), n(80), k(120);

cout << char(m) << endl;

cout << char(n) << endl;

cout << char(k) << endl;

Output:

D

A

X

Mark can be added to an integer, returning the integer after the operation. Invalid marks will not add any value to the integer.

Mark n(80), k(120);

cout << (val += n) << endl;

cout << (val += k) << endl;

Output:

140

140

##Tester program:

#include

#include "Mark.h"

using namespace std;

using namespace sdds;

int main() {

Mark m, n(25), k(200), p(-10);

cout << "int ............" << endl;

cout << int(m) << endl;

cout << int(n) << endl;

cout << int(k) << endl;

cout << int(p) << endl;

cout << "+= ............." << endl;

cout << int(m += 20) << endl;

cout << int(n += 20) << endl;

cout << int(k += 20) << endl;

cout << int(n += 60) << endl;

cout << "= .............." << endl;

cout << int(m = 80) << endl;

cout << int(n = 120) << endl;

cout << int(k = 70) << endl;

cout << "double ........." << endl;

m = 50; n = 80; k = 120;

cout << double(m) << endl;

cout << double(n) << endl;

cout << double(k) << endl;

cout << "char ..........." << endl;

cout << char(m) << endl;

cout << char(n) << endl;

cout << char(k) << endl;

cout << "int += Mark ..." << endl;

int val = 60;

cout << (val += n) << endl;

cout << (val += k) << endl;

return 0;

}

Here is the execution sample for the tester program

int ............

0

25

0

0

+= .............

20

45

0

0

= ..............

80

0

70

double .........

1

4

0

char ...........

D

A

X

int += Mark ...

140

140

Modify the tester program to test all the different circumstances/cases of the application if desired and not that the a new tester may have many more samples than the tester program here