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can someone check what"s wrong?(89c51,keypad,LCD)

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Cucanh

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A warm greet to all of you!!
Iam a student.I have just learned microcontrollers for a few weeks.
I am doing a small exercise myself ( because my project involves them).
since Iam not very good at programming,so can you check what's wrong with my code?
it displays the wrong pressed key.Can you correct it for me??
( actually l got this code from the internet)
the exercise involves: onchip 89c51, LCD 16*2, 4X4 keypad.Everytime,as a key is pressed,then the LCD will display the name of pressed key on the second line of LCD 16*2.
I have added all you need to understand below.( you can run it on proteus and see some messages)
thank you very much!!!
 

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