Test Score Evaluation
Create a procedure named CalcGrade that receives an integer value between 0 and 100, and returns a single capital letter in the AL register. Preserve all other register values between calls to the procedure. The letter returned by the procedure should be according to the following ranges:

Score Range & Letter Grade
90 to 100, A
80 to 89, B
70 to 79, C
60 to 6 9, D
0 to 59, F

Write a test program that generates 10 random integers between 50 and 100, inclusive. Each time an integer is generated, pass it to the CalcGrade procedure. You can test your program using a debugger, or if you prefer to use the book’s library, you can display each integer and its corresponding letter grade. (The Irvine32 library is required for this solution program because it uses the RandomRange procedure.)

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str1 BYTE "Test score generated is: ", 0
str2 BYTE "The letter grade is: ", 0

main PROC
call Clrscr
mov ecx,10

call GenerateScore ; generate random integer
loop L1

main ENDP

GenerateScore PROC USES eax edx
mov eax,51
call RandomRange
add eax,50
mov edx, OFFSET str1
call WriteString
call WriteDec
call Crlf
call CalcGrade

mov edx, OFFSET str2
call WriteString
call WriteChar
call Crlf
call Crlf...

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