C programming from step zero

1. You need a computer.
   1. If you use a linux machine, you probably have gcc already, so, skip to step 3
   2. If you use a windows PC, go to step 2
2. Download C: follow wikibooks:C Programming/Using_a_Compiler, and c.f. wikibooks:C Programming/What you need before you can learn
3. Write your "hello, world" programme: follow wikibooks:C_Programming/A_taste_of_C
4. Follow up: wikibooks:C_Programming/Structure_and_style