Bug in main.asm when we enter a large string then run the program again with a smaller size string the encryption output is wrong

[MostafaAE]

BUG in main.asm

main.asm have a bug: When we enter a large string then run the program again with a smaller size string the encryption outputs a string of size equals to the largest string entered filled with garbage values.

Failed test cases:

Enter a string: qqqqqqqq
Enter 4 keys
Enter Key 1: 0
Enter Key 2: 0
Enter Key 3: 0
Enter Key 4: 0

Program Output:

✔️

Enter a string: q
Enter 4 keys
Enter Key 1: 0
Enter Key 2: 0
Enter Key 3: 0
Enter Key 4: 0

Program Output:

❌

-------------------------------------------------------------------------------------------------------------------------

Expected Output:
The Second output must be 1 character only not 8!

✔️

[MostafaAmin0]

Fri 8/1/2021
I solved this bug by adding a new variable called printString to copy exactly the same number of characters the user input from teaOut and pass it to MsgBox .

inserted code

mov ecx, inputLen
lea ebx, teaOut
lea edx, printString

copyTeaOut:

mov al, [ebx]
mov [edx], al

inc ebx
inc edx

LOOP copyTeaOut
mov BYTE PTR [edx], 0