Write a QBASIC program to grade any score entered from the keyboard as either "Poor" for a score that is below 50% or "Satisfactory" for a score that is equ...

Write a QBASIC program to grade any score entered from the keyboard as either "Poor" for a score that is below 50% or "Satisfactory" for a score that is equal to or above 50%. The program execution should stop as soon as a score that is less than zero is entered.

REM Program to grade a score as "Poor" or "Satisfactory"
DIM score AS INTEGER
DIM grade AS STRING
DO
    INPUT "Enter score (enter a negative number to quit): ", score
    IF score < 0 THEN
        END
    END IF
    IF score < 50 THEN
        grade = "Poor"
    ELSE
        grade = "Satisfactory"
    END IF
    PRINT "Grade: "; grade
LOOP
END

Answer Details

To write a QBASIC program that grades a score as "Poor" or "Satisfactory", follow these steps:

1. Start by declaring the necessary variables. We need a variable to store the score entered from the keyboard, and another variable to store the grade.
2. Next, use the INPUT statement to prompt the user to enter a score. Then, use the VAL function to convert the input to a numerical value and store it in the score variable.
3. Use an IF-THEN statement to check if the score is less than zero. If it is, the program should stop executing using the END statement.
4. If the score is not less than zero, use another IF-THEN statement to check if the score is less than 50%. If it is, assign the grade "Poor" to the grade variable. If the score is 50% or greater, assign the grade "Satisfactory" to the grade variable.
5. Finally, use the PRINT statement to display the grade to the user.

Here's the complete QBASIC program:

REM Program to grade a score as "Poor" or "Satisfactory"
DIM score AS INTEGER
DIM grade AS STRING
DO
    INPUT "Enter score (enter a negative number to quit): ", score
    IF score < 0 THEN
        END
    END IF
    IF score < 50 THEN
        grade = "Poor"
    ELSE
        grade = "Satisfactory"
    END IF
    PRINT "Grade: "; grade
LOOP
END

When the program is run, it will prompt the user to enter a score. If the score is less than zero, the program will stop executing. If the score is greater than or equal to zero, the program will grade the score as "Poor" or "Satisfactory" and display the grade to the user. The program will continue to prompt the user for scores until a negative number is entered.