Calculator with brackets in C?

Question

C++ / C#

Good afternoon.
I can't cope with the implementation of the calculator, which would take into account the precedence and parentheses in the C language.
Without using all sorts of libraries, you can only atoi, write.
I would be grateful for help and answers.

Answer 1

The easiest way to do this is to use reverse Polish notation.
Google the shunting yard algorithm, you will find an implementation in C.