reading about indentation styles in wikipedia

• 1 K&R style
  • 1.1 Variant: 1TBS
• 2 Allman style (bsd in Emacs)
• 3 BSD KNF style
• 4 Whitesmiths style
• 5 GNU style
• 6 Horstmann style
• 7 Pico style
• 8 Banner style
• 9 Other considerations
  • 9.1 Losing track of blocks

I prefer the 1TBS with 4 space tabs.
But the Allman style is also useful to keep track of the braces