Understanding of side effects and sequential points in C language

Source: Internet
Author: User

Side effects: Changes to data objects or files such as: Dada = 5; Setting the value of Dada to 5 is the side effect of the statement Dada = 5; the increment and decrement operators are also used as side effects.

Order points: The side effects are calculated before entering the next step; C language '; ' represents a sequential point

Example: while (n++ < 10)

printf ("%d \ n", n.);

N After the fall in the while inside the judgment after the addition of 1 or printf () after the output plus 1, because while () judgment is a complete expression, so it is a sequential point, so n judgment after the addition of 1 is also considered as its side effects, need to add 1 after the output.

Understanding of side effects and sequential points in C language

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