Selection Exercise 1

Develop a program to read an examination mark. It should display a Pass if the mark lies between 40% - 60% (inclusive), Merit if it lies above 60% and Fail if it lies below 40%

Algorithm

ExamMarks
    read exam mark
    if exam mark > 60 then
        write Merit
    else
        if exam mark >= 40 then
            write Pass
        else {exam mark must be less than 40%}
                write Fail
        endif
    endif
End.

Because the evaluation of a nested if statement produces mutually exclusive selection the above nested if statement will work. If the mark is not > 60 then the program will evaluate the mark for >= 40. This will result in the evaluation of marks between 40 and 60 inclusive as any mark > 60 would have been picked up at the start of the if statement.

Data Item Table

PROGRAM: marks.cpp