容易忘記的運算符縮寫 ( Operators in C )

(Addition assignment)   a += b  ---> a = a + b


(Subtraction assignment) a -= b ---> a = a - b





Ternary conditional (三元條件)

c = (a > b) ? 1 : 2

means:

if (a > b )
{
    c = 1;
}else
{
    c= 2;
}