0x00-hello_world

0x00. C - Hello, World

• Why C programming is awesome (don’t forget to tweet today, with the hashtag #cisfun :))
• Who invented C
• Who are Dennis Ritchie, Brian Kernighan and Linus Torvalds
• What happens when you type gcc main.c
• What is an entry point
• What is main
• How to print text using printf, puts and putchar
• How to get the size of a specific type using the unary operator sizeof
• How to compile using gcc
• What is the default program name when compiling with gcc
• What is the official Holberton C coding style and how to check your code with betty-style
• How to find the right header to include in your source code when using a standard library function
• How does the main function influence the return value of the program

Exercises

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##0-preprocessor

Write a script that runs a C file through the preprocessor and save the result into another file.

• The C file name will be saved in the variable $CFILE
• The output should be saved in the file c

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1-Compiler

Write a script that compiles a C file but does not link.

-The C file name will be saved in the variable $CFILE -The output file should be named the same as the C file, but with the extension .o instead of .c.

• Example: if the C file is main.c, the output file should be main.o

2-assembler