*I am trying to implement a calculator which takes input via keypad or any other way like switches etc decode it into binary numbers via decoder ic perform airthmetic calculations(add,sub,mul and division only) and display the result on either 7 segments or on LCD.*

but so far what i hav is idea of how it should be and not any thory articles related to it and idea of how to implement it.

i want to take input in decimal form ,from 0-9 calculate it and display the result which i may restrict to 2 digits(less than 100).

i hope u will understand what i said and will try to help me to solve this...

but so far what i hav is idea of how it should be and not any thory articles related to it and idea of how to implement it.

i want to take input in decimal form ,from 0-9 calculate it and display the result which i may restrict to 2 digits(less than 100).

i hope u will understand what i said and will try to help me to solve this...