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指针>>1=除以二 <<1=乘以二%u 无符号10进制整数%d 有符号10进制整数%x 无符号16进制整数%o 无符号8进制整数

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51单片机利用定时器0延时1分钟P1间隔闪烁// An highlighted block#include <reg51.h>#define uchar unsigned charvoid delay60s();void main(void){ while(1){ P1=0x00; delay60s(); P1=0xff; delay60s();}}void delay60s(){ uchar i,t; T

51单片机主函数实现P1口120ms间隔从P1.7口向右循环进行流水灯每次只能亮一个，进入外部中断是进行120ms的延时灯的亮灭各一次#include <reg51.h>#include <intrins.h>#define uchar unsigned charvoid delay_ms(uchar x);void renwu1();void main(){ EA=1; EX0=1; IT0=1; while(1) { renwu1(

按下按键的值最左边数码管显示行其次左边第二个显示列#include <reg51.h>#define uchar unsigned charvoid delay_ms(uchar x);void display();void scanf();void delay5ms(void);uchar code num[16]= {0x3f, 0x06, 0x5b, 0x4f,0x66, 0x6d, 0x7d, 0x07,0x7f, 0x6f, 0x77, 0x7c,0x39, 0x5e,

#include <reg51.h>#include <intrins.h>#define uchar unsigned char uchar count;void main(){ EA = 1; ET1 = 1; TMOD = 0x50; TH1 = 0xffff; TL1 = 0xffff; TR1 = 1; P2=0; while(1) { P2=count; }}void Int1() interrupt 3{ T

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