How to make a simple touch calculator using Arduino & Nintendo DS Touch Screen?

Using Arduino Project Guidance
1

I have an Arduino Uno, a lcd & a Nintendo DS Touch Screen. I'm able to make a touchscreen keypad using nintendo ds but i want touch input be stored somewhere unless user presses an operator(+,-,/,*) between two single digit numbers followed by the "=" key like "2+3=". And on pressing the "=" key the result should be displayed on lcd if the inputs are valid. I just want basic 4 operation for now i.e add,subtract,multiply and divide. How to do it.....i want programming help.

Thanxx in advance.

2

If you'd like help, you need to tell us what it is you need help with, like showing us the code you've already written, and any problems you're having with it.

3