Hex2Dec

因為VC++沒有支援Hex2Dec，所以只好自己寫了

因為對VC++不熟，外加搞不清楚狀況，所以寫了好久

不過也因為如此，學會如何簡單的寫VC++了

  int Hex2Dec( System::Windows::Forms::TextBox^ textBox)
  {
    int Val = 0;
    int Sum = 0;
    int Count = 0;
    if (textBox->TextLength <= 2)
    {
      String^ str = textBox->Text;
      do
      {
           Sum *= 16;
        if ( str[Count]>='0' &&  str[Count]<='9' )
        {
         Val = Convert::ToInt32( str[Count] ) - '0';
        }
        else if ( str[Count]>='A' &&  str[Count]<='F' )
        {
         Val = Convert::ToInt32( str[Count] ) - 'A' + 10;
        }
        else if ( str[Count]>='a' &&  str[Count]<='f' )
        {
         Val = Convert::ToInt32( str[Count] ) - 'a' + 10;
        }
        else
        {
          // failed!!!
        }
        Count++;
        Sum += Val;
      }while( textBox->TextLength - Count );
      //textBox2->Text =Sum.ToString();
    }
    else
    {
     // format error!!!
    }
    return Sum;

  }

 

使用方式

textBox2->Text =Hex2Dec( textBox1 ).ToString();

終於搞定入門款了