标题: 按书上写的编译错误error C202:undefined identifier error C141: syntax error near [打印本页]

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作者: ufyictj    时间: 2021-9-5 21:29
标题: 按书上写的编译错误error C202:undefined identifier error C141: syntax error near
怎么修改啊我没有看懂，是按照书上来得但就是不对
ZXM02.c(21): error C202: 'north_south_time': undefined identifier
ZXM02.c(27): error C202: 'east_weat_red': undefined identifier
ZXM02.c(33): error C141: syntax error near 'north_south_yellow'
ZXM02.c(36): error C141: syntax error near 'north_south_yellow'
ZXM02.c(58): error C202: 'noeth_south_time': undefined identifier
单片机源程序如下:

1. #include  <reg51.h>
   
2. #include  <intrins.h>
   
3. typedef  unsigned char Uchar;
   
4. typedef  unsigned int  Uint;
   
5. #define ledport P0
   
6. #define nort_south_time P1
   
7. #define east_west_time P2
   
8. sbit north_south_red=P0^0;
   
9. sbit north_south_yellow=P0^1;
   
10. sbit north_south_green=P0^2;
    
11. sbit east_west_red=P0^3;
    
12. sbit east_west_yellow=P0^4;
    
13. sbit east_west_green=P0^5;
    
14. Uchar discode[]={ 0xC0,0XF9,0XA4,0XB0,0X99,0X92,0X82,0XF8,0X80,0X90,0X88,0X83,0XC6,0XA1,0X86,0X8E};
    
15. 
    
16. void Delay_nms (Uint nms);
    
17. void seg7_dis(Uchar Ntime);
    
18. 
    
19. void main()
    
20. {  ledport=0xff;
    
21.     north_south_time=0xff;
    
22.     east_west_time=0xff;
    
23. 
    
24.     while(1)
    
25.    {   north_south_green=0;east_west_red=0;
    
26.       seg7_dis(9);
    
27.       north_south_green=1;east_weat_red=1;
    
28.       north_south_yellow=0;east_west_yellow=0;
    
29.       seg7_dis(3);
    
30.       north_south_yellow=1;east_west_yellow=1;
    
31.       north_south_red=0;east_west_green=0;
    
32.       seg7_dis(9)
    
33.       north_south_yellow=0;east_west_yellow=0;
    
34.       north_south_red=1;east_west_green=1;
    
35.       seg7_dis(3)
    
36.       north_south_yellow=1;east_west_yellow=1;
    
37.    }
    
38. }   
    
39. 
    
40. void Delay_nms(Uint nms)     {
    
41.   Uchar i, j;
    
42.    do {
    
43.        _nop_();
    
44.        i=2;
    
45.        j=199;
    
46.        do
    
47.      {
    
48.           while (--j);
    
49.      } while (--i);
    
50.        }
    
51.     while(--nms);  
    
52. }
    
53. 
    
54. void seg7_dis(Uchar Ntime)
    
55.    { Uchar  tmp;
    
56.    do{
    
57.       tmp=discode[Ntime];
    
58.       noeth_south_time=tmp;
    
59.       east_west_time=tmp;
    
60.       Delay_nms(1000);
    
61.    }while(--Ntime);
    
62.   }

复制代码

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作者: lkc8210    时间: 2021-9-5 22:00
06，07行打错字了

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作者: seuww    时间: 2021-9-5 23:03
error C202: 'north_south_time': undefined identifier
error C202: 'east_weat_red': undefined identifier
没戴眼镜儿吗？

#define nort_south_time P1
sbit east_west_red=P0^3;

没看出来不同？应该是这两个标识符写错了吧？

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