板上各位前輩大家好:    小弟寫了一個程式compiler都出現錯誤可以請幫我一下看我是哪裡有宣告錯誤    謝謝    

     void __fastcall TForm1::Button1Click(TObject *Sender)
    {
      void Read_Files();
      void preEmphasized(short *signal);
      void hamWindow();          // Main //        Read_Files();  // 呼叫函式把聲音檔讀進來存在singnal裡
    preEmphasized(signal); // 呼叫函式將singnal裡的資料做運算
    hamWindow();
    //將 preEmphasized和 hamWindow 相乘存到fftData
    double *fftData = new double[512];
    for (int j = 0; j < 256; j  )
    {
       fftData[j] = preEmphasized[j] * hamWindow[j];
    }         for (int j = 0; j < 256; j  )
     {
    ListBox1->Items->Add(fftData[j]);
   }    }
//------------------------------------------------------------------
void Read_Files()
{
   int FileLen,dd=44;
   char* file_name="1.WAV";
   short *signal;
   FILE *inf;
   bool open_flag;
   int handle;
     if (open_flag==true)
   {
      fclose(inf);
   }
   inf=fopen(file_name,"r");
   open_flag=true;
   handle=fileno(inf);
   FileLen= filelength(handle);
   if (feof(inf))
   {
      fclose(inf);
      open_flag=false;
   }
   signal = new short[(FileLen-dd)];
   fseek(inf,dd,SEEK_SET);
   fread(signal,sizeof(short),(FileLen-dd),inf);    }
//---------------------------------------------------------------------------
void preEmphasized(short *signal)
{
  double *preEmphasized = new double[1024];
  for (int i = 1; i < 1024; i  )
  {
      preEmphasized[i] = signal[i]   signal[i - 1] * -0.97;
      preEmphasized[0] = signal[0];
  }    }
//---------------------------------------------------------------------------
void hamWindow()
{
   double PI = 3.14159;
   double windowSize = 256;
   double *hamWindow = new double[windowSize];
   for (int i = 0; i < windowSize; i  )
   {
       hamWindow[i] = 0.54 - 0.46 * cos(2 * PI * i / windowSize);
   }
}
//---------------------------------------------------------------------------    

抱歉忘了把錯誤訊息貼上來 錯誤訊息 Undefined symbol 'signal' Size of the type 'void(short *)' is unknown or zero Size of the type 'void()' is unknown or zero Illegal use of pointer

To huei_brother: 你在Button1Click中真的並未定義signal這個變數; signal也不是外部變數, 所以才會產生錯誤; 試試看 將Read_File()函數中對signal的定義移到外部去. 還有.. 變數最好改個名字.

huei_brother 你好：    由你的程式註解來看，會不會是呼叫 preEmphasized() 函式時所給予的參數名稱寫錯了 (少了一個 n)？

preEmphasized(signal); // 呼叫函式將singnal裡的資料做運算

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