[求助]程序有問題

#include<reg52.h>
#define uint unsigned int
#define uchar unsigned char
sbit wela=P2^7; sbit dula=P2^6;
uchar num;
uchar code table[]={0x3f, 0x06,0x5b,0x4f,0x66,0x6d, 0x7d,0x07,0x7f,0x6f,0x77, 0x7c,0x39,0x5e,0x79,0x71};
void delay=(uint z);

void main()
{ wela=1; P0=0x00; wela=0;

while(1)
{ for(num=0;num<16;num++)
{ dula=1; P0=table[num]; dula=0; delay(1000); } } }

 void delay(uint z)
 { uint x,y; for(x=z;x>0;x--)
 for(y=110;y>0;y--); }

編譯錯(cuò)誤

 LESSON.C(16): error C231: 'wela': redefinition LESSON.C(17): error C141: syntax error near 'while' LESSON.C(17): error C141: syntax error near '1' LESSON.C(19): error C141: syntax error near '=', expected ')' LESSON.C(19): error C129: missing ';' before '<' Target not created 怎么回事呀