eval.cpp:C ++中的基本数学解析器（仍在进行中，实际上是针对另一个项目；我最终使它比预期的更完整）

# The Magnificent Online Command-line Calculator Please help me to debug it by throwing everything you can at it. Currently, only integers are supported. If you don't want to compile and run it locally, fire up your terminal and enter the following command: $ nc 173.18.215.230 9999 I have a RaspberryPi sitting next to me whose sole purpose is currently to act as _The Magnificent Online Command-line Calculator_. You can even send commands directly to it, and pipe the data back. If you want to try running the server-side code yourself, check out the `server` branch. ### Allowed operators `+` Addition `-` Subtraction `*` Multiplication `/` Division (integer division only!) **parentheses** determine the order of operations **spaces** between numbers and operators are ignored ### Usage and Examples It can be run in one of two ways, **command-line mode** and **interactive mode**. If any arguments are detected, it runs as **command-line mode**, treating all arguments as a calculator would. This output can be piped as you would with any other command. $ eval-test 1 + 2 3 $ eval-test 1+(-20)*46/-2 437 If no arguments are passed, it runs as **interactive mode** $ eval-test Enter a calculation: 1+2 > 3 Enter a calculation: 1+(-2)*4/-2 > 2 In interactive mode, press `CTRL+C` at any time to exit the program. ### Bugs and future work Please help me to debug it by throwing everything you can at it. If it returns a "readable" error message (such as _"Nothing inside the parentheses"_, that's okay, and means I know about the problem, and am handling it properly. The types of bugs you should tell me about are: * Incorrect values returned by calculations * Just quitting or crashing for no reason whatsoever * Feature requests Submit bugs or ideas to the following GitHub repo: * http://www.github.com/IQAndreas/eval.cpp **Known issues:** * Order of operations is ignored; everything is parsed from left to right, regardless of operator type. _(do you have any idea how hard tricky this is to do elegantly and without repeated code?!? I'm going to have to re-write everything if I want some sort of order of operations system! (which I may do))_ * Only handles 32 bit signed integers _(max values of **-2,147,483,648** to **2,147,483,647**)_ * No floats, only integer division is allowed _(this was on purpose, actually, since I created it for a very specific project. This could change now)_