|按位或运算符,比如:0xF0|0x0F =0xFF
是或运算 比如:A=00110010B;B=11110000B;C=A|B;C就等于11110010B
位运算,或运算有1则1
______00000010______01010111___|_________________01010111就是1|0=1,0|0=0,1|1=1,0|1=1