Question

Question 2

Use a

switch statement

to write the following program: Using C++

The program prompts the user for a letter grade (of type char). The list of valid letter grades

is:

A

B

C

D

E

F

The program should consider both lower and upper case

The program will then display the following messages:

For grade ‘A’: display “Excellent”

For grade ‘B’: display “Good”

For Grade ‘C’: display “Average”

For grade ‘D’ or ‘E’: display “Below Average”

For Grade ‘F’: display “Fail”

For any other letter grade entered by users: display “Invalid Grade”

Your test plan should include tests for each possible output, invalid input, and lowercase

letters.

Provide a total of 4 test cases:

-

You can choose a mix of test cases with uppercase inputs A, B, C, D, E, F or

lowercase inputs a, b, c, d, e, f.

-

1 invalid test case (provide a letter that is not within [A,F] or [a,f])

Test #	Valid / Invalid Data	Description of test	Input Value	Actual Output	Test Pass / Fail
1	Valid				Pass
2	Valid				Pass
3	Valid				Pass
4	Invalid				Pass

Answer 1

CODE IN C++:

#include <iostream>

using namespace std;

int main()
{
// declaring variable
char grade ;
//taking input from the user
cout << "Enter the grade (A/B/C/D/E/F) : ";
cin >> grade;
switch(grade){
case 'A':
case 'a':
cout << "Excellent" << endl ;
break;
case 'B':
case 'b':
cout << "Good" << endl ;
break;
case 'C':
case 'c':
cout << "Average" << endl ;
break;
case 'D':
case 'd':
case 'E':
case 'e':
cout << "Below Average" << endl ;
break;
case 'F':
case 'f':
cout << "Fail" << endl ;
break;
default:
cout << "Invalid Grade" << endl;
}
  
return 0;
}

OUTPUT:

input Enter the grade (A/B/C/D/E/F) : A Excellent ... Program finished with exit code o Press ENTER to exit console.