ex1.lst

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C51 COMPILER V8.08   EX1                                                                   09/04/2008 16:21:25 PAGE 1   


C51 COMPILER V8.08, COMPILATION OF MODULE EX1
OBJECT MODULE PLACED IN ex1.OBJ
COMPILER INVOKED BY: C:\Program Files\keil\C51\BIN\C51.EXE ex1.C BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #include <stdarg.h>                                                             //头文件
   2          #include <stdio.h>
   3          
   4          int VFunc (char *buf, int id, ...)                                              //自定义函数
   5          {
   6   1        va_list tag;                                                                  //定义tag为参数表指针
   7   1      
   8   1        va_start (tag, id);                                                           //调用va_start函数
   9   1      if (id == 0)
  10   1      {
  11   2          int arg1;
  12   2          char *arg2;
  13   2          long arg3;
  14   2      
  15   2          arg1 = va_arg (tag, int);                                           //调用va_arg函数返回参数
  16   2          arg2 = va_arg (tag, char *);
  17   2          arg3 = va_arg (tag, long);
  18   2        }
  19   1        else 
  20   1      {
  21   2          char *arg1;
  22   2          char *arg2;
  23   2          long arg3;
  24   2      
  25   2          arg1 = va_arg (tag, char *);                                                //调用va_arg函数返回参数
  26   2          arg2 = va_arg (tag, char *);
  27   2          arg3 = va_arg (tag, long);
  28   2        }
  29   1        va_end (tag);                                                                 //关闭参数表
  30   1      }
*** WARNING C280 IN LINE 4 OF EX1.C: 'buf': unreferenced local variable
  31          
  32          void main(void) 
  33          {
  34   1        char tmp_buffer [10];
  35   1      
  36   1        VFunc (tmp_buffer, 0, 19, "Test Code", 200L);         //调用函数
  37   1        VFunc (tmp_buffer, 1, "Test", "Code", 218L);                  //再次调用，不同的输入参数
  38   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    247    ----
   CONSTANT SIZE    =     20    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----      43
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


C51 COMPILATION COMPLETE.  1 WARNING(S),  0 ERROR(S)