51单片机程序编写（劳驾写得详细一点）？

#include
void delay(unsigned int n)
{
while(n--);
}
void main()
{
char i;
//可以编好想要怎么流水的灯位的状态
unsigned char led[8]={0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80};
while(1)
{
for(i=0;i<8;i++)
{
P1=led[i]; //LED接在P1口
delay(10000);
}
for(i=0;i<8;i++)
{
P1=led[8-i];
delay(10000);
}
}
}

#include
void delay(unsigned int x)
{
while(x--);
}
void main() //
{
unsigned char i,j;
while(1)
{
i= 0x01;
for(j=0;j<8;j++)
{
P1=~i;
delay(20000);
i=i<<1;
}
i= 0x80;
for(j=0;j<8;j++)
{
P1=~i;
delay(20000);
i=i>>1;
}
}

#include
void delay(unsigned int n)
{
while(n--);
}
void main()
{
unsigned char n=0;
unsigned char val[8]={0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80};
unsigned char led=0;
while(1)
{
if ( n<8 ) led = val[n];
else led = val[15-n];
P1=led;
n++;
if ( n>15 ) n=0;

delay(10000);
}
}