magkopian / infix-to-postfix

This is a parser, implemented with C, Flex and Bison, that parses infix mathematical expressions and convetrs them to postfix. After each successful convertion, it calculates the result of the postfix expression.

Description:

This is an infix to postfix converter implemented with C, Flex and Bison. For every infix expression the program calculates the postfix equivalent and the mathematical result.

The user can either input the infix expressions directly to the program or load them from a file. There are supported all the basic operands '+', '-', '*', '/', '^', '%', '(', ')'. But, there is not supported the unary minus and also there are supported only integer numbres.

How to Build:

All you need to do to compile the code is just use the Makefile by running,

make

For this to work, the gcc compiler, make, flex and bison programs have to be installed. On Debian and Ubuntu based system all the build dependecies can be installed as followes,

sudo apt update
sudo apt install gcc make flex bison

How to use:

To input the infix expressions directly to the program, you just run it like this:

./in2post

To give the input via a file, you have to specify the file path as an argument like this:

./in2post path/to/file

Every expression must be on its own line. All empty space is ignored, you can you as many new lines, tabs and spaces you want.