This repository contains C++ implementation of fractions. Implementation is a fun project and is not production-ready, so don't use it in your project if you want to have exact numbers, if you want to use exact numbers, you can use this boost library (or implements your owns for sure).
If you still want to check this repository, then I describe the basics for you below.
After the start of the program you will be asked "What do you want to do?", you can use operators +, -, * and / for two numbers. You can also save that expression to a variable by name_of_variable = and expression.
For variables, you can use previous operators and logic operators <, <=, >, >=, == and !=. The result of a logical expression cannot be stored in a variable. The result of others can.
If you want to exit from the program simply write "exit".
The project contains two classes. Class ExactNumber implements only numbers and operators for them. Numbers are implemented as fractions and after every operation are that fractions are minimized per GCD (greatest common divisor).
Class Calculator implements a command-line program for users and stores variables.
First, I'm sorry for my crappy English. Second, as I write above, this is a fun project that cannot be used in production code. There are lots of parts that can be implemented better. For example find GCD can be implemented by GCC build-in function that significantly speeds up finding of GCD, if you are interested in that, you can check this post.