有没有大神知道为什么这个单片机篮球计分板的电路是乱码并且按钮无效 -

#include<reg51.h>
unsigned char codeseg[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x00,0x90 };
inti=11,j=59,a=0,b=0,m=0,n=0,temp,s=0,r=24,k;
sbit aa=P0^0;
sbit bb=P0^1;
sbit one=P0^2;
sbit two=P0^3;
sbit three=P0^4;
sbit exchange=P0^5;
sbit stop=P0^6;
sbit led=P3^6;
sbit tt=P3^7;
void delay(int x)
{
intw,q;
for(w=0;w<x;w++)
for(q=0;q<120;q++);
}
void display(int i,int j,int a,int b)
{
P2= 0x01;
P1= seg[i/10];
delay(1);
P2= 0x00;
P2= 0x02;
P1= seg[i%10];
delay(1);
P2= 0x00;
P2= 0x04;
P1= seg[j/10];
delay(1);
P2= 0x00;
P2= 0x08;
P1= seg[j%10];
delay(1);
P2 = 0x00;
P2=0x10;
P1= seg[a/10];
delay(1);
P2=0x00;
P2=0x20;
P1 = seg[a%10];
delay(1);
P2= 0x00;
P2 = 0x40;
P1= seg[b/10];
delay(1);
P2= 0x00;
P2=0x80;
P1 = seg[b%10];
delay(1);
P2= 0x00;
}
void time0() interrupt 1
{
TH0 = 0xb1;
TL0= 0xe0;
m++;
if(m==50)
{
m=0;
j--;
if(j==-1)
j= 59;
n++;
if(n==60)
{
n=0;
i--;
if(i==0&&j==0){
ET0=1;
TR0= 1;
}
}
}
display(i,j,a,b);
}
void main()
{
P0= 0x00;
display(12,0,0,0);
TMOD= 0x01;
TH0= 0xb1;
TL0= 0xe0;
IE= 0x82;
TR0= 1;
while(1)
{
if(aa==1&&one==1)
{a++;display(i, j, a, b);while(one==1);}
elseif(aa==1&&two==1)
{a=a+2;display( i, j, a, b);while(two==1);}
elseif(aa==1&&three==1)
{a=a+3;display(i, j, a, b);while(three==1);}
elseif(bb==1&&one==1)
{b++;display(i, j, a, b);while(one==1);}
elseif(bb==1&&two==1)
{b=b+2;display( i, j, a, b);while(two==1);}
elseif(bb==1&&three==1)
{b=b+3;display( i, j, a, b);while(three==1);}
else if(exchange==1)
{temp= a;a = b;b = temp;delay(500);}
elseif(stop==1) {ET0=0;TR0=0;while(stop==1);while(stop==0);while(stop==1){ET0=1;TR0=1;}}
}
}

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