The calculator, you always desired, but could not get it. Until now. This is a new innovation in the industry. This is a highly innovative, ultra fast, modern calculator that satisfies the needs of our modern times
I invented new calculator!! Are you tired of all of these flashy ultra modern calculators? You want some old school?
You really love text based MS DOS interface? You love the late 90's/early 00's dotcom bubble and Y2K ?
Then this calculator is for you! Just copy the source code below into your IDE, compile and run!
The code does not use any libraries except iostream
Added the check if the input is a valid number
Added factorial function
The code became a bit more cleaner