Day 8 Data types, Variables, and Operators (Ⅳ)

Truth Table
Let A and B be two Boolean variables.

Then the truth table for logical operators is as follows:

Arithmetic Compound Assignment Operators

EX1:

EX2:

比较++x & x++的差异

++x 是先加值到x,再传回y,所以x=1+1=2=y.
x++ 是先传值给y, x再加值,所以x=1=y,x+1=2.
这两个很容易搞混!必须注意!