[Rules] Coding Standard Style

• Indent
• use tab with four-space
• Line Width
• fixed width: 
• Privilege margin
• public, protected, and then private
• alignment
• put space around operators, e.g. hamster = "cute"
• pointer: use int *a; rather than int* a;   since the following situation adopts: int *a, *b;
• Naming
• Capital
• Constants: THIS_IS_CONSTANT
• Macro: #define ROUND(x) (int)(x+0.5)
• Ref: Mozilla