To run the following code, you have to install the Quicklisp library manager by following the steps in my blog post titled cmu-infix.

(ql:quickload :infix-math)

(asdf:load-system "infix-math/calc")

(infix-math/calc:calc)

This problem of using this calculator is that spaces are required both before and after an operator:

wrong:

1+1

correct:

1 + 1

— Me@2022-12-26 10:19:05 AM

.

.

2023.09.09 Saturday (c) All rights reserved by ACHK