Lab 4 - Interpreter - VG101 FA2022 (Xiaodong)

Please name your code as lab4.c and compress it to a zip file to upload.
Don't forget to submit the code to Canvas!

Problem
#1: Lab 4- Interpreter Milestone 1: able to calculate an expression
#2: Lab 4- Interpreter Milestone 2: able to store variables
#3: Lab 4- Interpreter Milestone 3: able to suppress input

Lab 4 - Interpreter