Temporary programming environments for students and teachers https://sandbox.cs50.io/
Prints less arcane compiler and Valgrind messages
Usage: help50 ./program command line args or
help50 valgrind ./program command line args
Runs a program step by step, line by line, to see what is happening
Usage: debug50 ./program command line args
Checks for alignment to the CS50 style guide
Usage: style50 program.c
Checks for correctness using test cases
Usage: check50 cs50/problems/2018/ap/problem_name