Corso di programmazione in C

by Salvatore Sanfilippo aka Antirez

🇮🇹: Gli script del Corso C, creato da Antirez e disponibile su YouTube

Lesson 1: Overview

• intro to the course
• overview of C language
• first program "Hello World"
• compilation process
• preprocessor and headers
• function prototypes

Lesson 7: Overview

• tail call optimisation
• while loop
• for loop
• for loop without initialisation, stop condition, and increment
• switch
• declaring variables inside the switch by using a block

Lesson 15: Overview

• program arguments (argc, argv)
• opening and closing files with fopen and fclose
• reading files line by line using fgets
• defining a linked list with struct
• dynamically allocating memory with malloc
• copying strings into allocated memory
• inserting nodes at the head to reverse order
• traversing and printing a linked list
• reimplementing the Unix tac command
• complexity: O(n) build, O(n) print, memory trade-offs

Lesson 16: Overview

• motivation for prefixed length strings
• struct layout with natural alignment
• flexible array member (char str[], C99)
• creating a PLS with ps_create using malloc
• returning p->str and recovering header with pointer arithmetic
• reference counting (ps_retain, ps_release)
• freeing safely with ps_free
• validating objects with a magic field (0xDEADBEEF)
• utility functions: ps_print, ps_len, ps_validate
• safer memory management vs raw malloc/free
• trade-offs: extra memory overhead, optional debug builds