Dear Members I want to make such a digital calculator which has the description:


On the basis of users choice, calculate the arithmetic (Addition & Subtraction) expression given by user.

1.Decimal Mode
2.Binary Mode
3.Octal Mode
4.Hexadecimal Mode

Its mean that in every mode we are capable to make addition and subtraction but just for that specific mode which has to be called.

: Dear Members I want to make such a digital calculator which has the description:
:
:
: On the basis of users choice, calculate the arithmetic (Addition & Subtraction) expression given by user.
:
: 1.Decimal Mode
: 2.Binary Mode
: 3.Octal Mode
: 4.Hexadecimal Mode
:
: Its mean that in every mode we are capable to make addition and subtraction but just for that specific mode which has to be called.
:
:
I would suggest that you just use the common math functions (decimal) for that actual operations. The mode will simply translate the current values from the indicated mode to decimal.

For example, if the mode is Binary, you input a string, then feed that to a function that returns the decimal value of that binary string. Perform the indicated math function on that value. Then feed the resultant decimal value to another function that will transform the value to a binary string adn write that string to the result line or window.

Have other functions to do the transformations from/to hex and octal as well - or make your functions generic with a flag for the type of transform to perform.