51單片機(jī)8X8點(diǎn)陣隨機(jī)點(diǎn)亮LED燈

#include<reg51.h>
#define uint unsigned int
    void delay(){unsigned int i;
    for(i=0;i<30000;i++);}
   
    void main(){
    uint i,j,k,m;
    uint sled[8]={
    0xfe,0xfb,0xfd,0xf7,0xef,0xdf,0xbf,0x7f};
    uint duan[8]={0x10,0x20,0x40,0x80,
    0x01,0x02,0x04,0x08};
    while(1){
    k=rand()%8;
        m=rand()%8;
    P1=sled[k];
        P2=duan[m];
    for(i=1000;i>0;i--);
   for(j=110;j>0;j--);
    delay();}}

使用rand()函數(shù)，建議加上頭文件
#include<stdlib.h>