INTRINSH:内部函数函数名:_crol_,_irol_,_lrol_原型:unsignedchar_crol_(unsignedcharval,unsignedcharn);unsigne
左移01001111左移一位:10011110CY=0;第一位跑到CY上,最后一位补0;在keilc51中,内部函数库INTRINSH中_crol_(m,
include<reg52h>include<intrinsh>unsignedintdd,i;voidkey()interrupt0{if(i==0)
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