新手求助~为什么数码管不是按照从左到右依次显示0~7

#include <STC15F2K60S2.H>
unsigned char duan[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};
unsigned weima[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};
unsigned char i,j,s=0,f=0,h=0,t=0,shu,wei,a=1;
void init()
{
EA=1;
ET0=1;
TMOD=0X10;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
TR0=1;
}
void t0() interrupt 1
{
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
t++;
if(t==20) //微妙
{
t=0;
s++;
P25=~a;
P26=~a;
}
if(s==60)// 秒
{
s=0;
f++;
}
if(f==60)// 分
{
f=0;
h++;
}
if(h==24)// 时
{
h=0;
}
}
void Delay1000us()//延时函数
{
unsigned char i, j;
i = 3;
j = 150;
do
{
while (--j);
} while (--i);
}
void chuxian()
{
for(i=0;i<8;i++)
{
P1=weima[wei];
P0=duan[shu];
Delay1000us();
}
}
void xianshi() //显示函数
{
shu=s%10;
wei=0;
chuxian();
Delay1000us();
shu=s/10;
wei=1;
chuxian();
shu=f%10;
wei=2;
chuxian();
Delay1000us();
shu=f/10;
wei=3;
chuxian();
Delay1000us();
shu=h%10;
wei=4;
chuxian();
Delay1000us();
shu=h/10;
wei=5;
chuxian();
Delay1000us();
}
void main()//主函数
{
init();
while(1)
{
xianshi();
}
}

别人的程序果然看不懂