keil报错syntax error near 'unsigned', expected '__asm'是啥意思求助

m0_56443800 2022-05-14 23:27:26

#include <reg51.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#define uchar unsigned char
#define SNAKE 20 //????
#define TIME 50 //??????
#define SPEED 71 //????
//#define keyenable 1
sbit keyenable=P3^6; //????
/*sbit keyx=Po^1; /??
sbit keyy=po2; //?? */
//sbit up=P6^0;
sbit up=P3^3; //down
sbit down=P3^1;
sbit right=P3^2;
sbit left=P3^4;
uchar x[SNAKE+1];
uchar y[SNAKE+1];
uchar time,n,i,e; //????,????,??????,????
char addx,addy; //?????
/*****************
????
****************/
void delay(char MS)
{
char us,usn;
while(MS!=0)
{
usn = 0;
while(usn!=0)
{
us=0xff;
while(us!=0){us--;};
usn--;
}
MS--;
}
}

/******************************************
????????
************************/
void turnkey() // interrupt 0 using 2
{//up=1;
if(keyenable)
{
if(left){addy=0;if(addx!=1)addx=-1; else addx=1;}
if(right){addy=0;if(addx!=-1)addx=1; else addx=-1;}
if(up){addx=0;if(addy!=-1)addy=1; else addy=-1;}
if(down){addx=0;if(addy!=1)addy=-1; else addy=1;}

/*****************
????
*****************/
uchar mux(uchar temp)
{
if(temp==7)return 128;
if(temp==6)return 64;
if(temp==5)return 32;
if(temp==4)return 16;
if(temp==3)return 8;
if(temp==2)return 4;
if(temp==1)return 2;
if(temp==0)return 1;
return 0;
}
/*****************
???? ????
*******************/
void timer0(uchar k)
{while(k--)
{for(i=0;i<SNAKE+1;i++)
{P2=mux(x[i]);P1=255-mux(y[i]);
turnkey(); //????????
delay(TIME); //????
P2=0x00;P1=0xff;
}}
}

/***************************
???
***************************/
void main(void)
{e=SPEED;
P5=0x00;
P1=0xff;
P2=0x00;
P3=0x00;
while(1)
{//if(keyenable==1){P1=0x00;P2=0xff;}else(P1=0xff;P2=0x00;}
for(i=3;i<SNAKE+1;i++)x[i]=100;for(i=3;i<SNAKE+1;i++)y[i]=100; //???
x[0]=4;y[0]=4; //??
n=3; //?? n=-1
x[1]=1;y[1]=0; //??
x[2]=0;y[2]=0; //??1
addx=0;addy=0; //????
//k=1;
while(1){if(keyenable)break;timer0(1);}
while(1)
{timer(e);
if(knock()){e=SPEED;break;} //????
if((x[0]==x[1]+addx)&(y[0]==y[1]+addy)) //?????
{n++;
if(n==SNAKE+1)
{n=3;e=e-10;
for(i=3;i<SNAKE+1;i++)x[i]=100;
for(i=3;i<SNAKE+1;i++)y[i]=100;
}
x[0]=x[n-2];
y[0]=y[n-2];
}
for(i=n-1;i>1;i--){x[i]=x[i-1];y[i]=y[i-1];} //x[n-1]=x[2];y[n-1]=y[2];
x[1]=x[2]+addx;y[1]=y[2]+addy; //??
}
}
}