Matrix user forums

I have been struggling with this for a while now. I want to create a calculator on the 16x2 LCD display using the keypad as my input device.
I cant work out how to input the numbers from the keypad and get them to add together to display the result as well as the calculation on the LCD. can anyone help me out please?

Hi James,
Can you post your flowchart so we can see where your going wrong?
Is this a school or college project?

Martin