(Igor Zhirkov): Focuses on C, assembly, and program execution on Intel 64 architecture, ideal for those wanting to understand how code interacts with hardware. Quick Reference & Free PDF Repositories
★★★★☆ (4/5) – Excellent for reference and theory, limited for practice. pdf for c programming
(Jens Gustedt): A free, updated PDF that teaches C11/C17 standards. It is organized by levels (Level 0 to 2), making it a great progressive learning tool. (Igor Zhirkov): Focuses on C, assembly, and program