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0x00-hello_world

0x00. C - Hello, World

Introduction to programming and first set of assignments at Holberton School

What you should learn from this project

At the end of this project you are expected to be able to explain to anyone, without the help of Google:
  • 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 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

Tasks

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

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.

2-assembler

Write a script that generates the assembly code of a C code and save it in
an output file.
  • 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 .s instead of .c.

3-name

Write a script that compiles a C file and creates an executable named cisfun.
  • The C file name will be saved in the variable $CFILE

4-puts.c

Write a C program that prints exactly
"Programming is like building a multilingual puzzle, followed by a new line.
  • Use the function puts
  • You are not allowed to use printf
  • Your program should end with the value 0

5-printf.c

Write a C program that prints exactly with proper grammar, but the outcome is
a piece of art,, followed by a new line.
  • Use the function printf
  • You are not allowed to use the function puts
  • Your program should return 0
  • Your program should compile without warning when using the -Wall gcc option

6-size.c

Write a C program that prints the size of various types on the computer it is
compiled and run on.
  • You should produce the exact same output as in the example
  • Warnings are allowed
  • Your program should return 0
  • You might have to install the package libc6-dev-i386 on your Linux (Vagrant) to test the -m32 gcc option

100-intel

Write a script that generates the assembly code (Intel syntax) of a C code and
save it in an output file.
  • 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 .s instead of .c.

101-quote.c

Write a C program that prints exactly and that piece of art is useful"
- Dora Korpar, 2015-10-19, followed by a new line, to the standard error.
  • You are not allowed to use any functions listed in the NAME section of the man (3) printf or man (3) puts
  • Your program should return 1
  • Your program should compile without any warnings when using the -Wall gcc option