我在.h檔是這樣宣告的 Graphics::TBitmap *SelectImg; 在.cpp檔是這樣宣告的 SelectImg = new Graphics::TBitmap[10]; SelectImg[0].Width = 20; 到目前是沒錯了~ 但當我要把它show出來的時候: showimg1->Canvas->Draw(0, 0, SelectImg[0]); 它的錯誤訊息是:Cannot convert 'TBitmap' to 'TGraphic' 還有Type mismatch in parameter 'Grapgic'{wanter 'TGraphic *',got 'TBitmap'} 以上第一個問題~~ 然後我想把SelectImg丟到副函式mask(); 我是這麼宣告得mask(Graphics::TBitmap *SelectImg); 請問這樣對嗎? 還有原本只有宣告一個SelectImg的時候 SelectImg = new Graphics::TBitmap; 用的是SelectImg->Width=20; 為什麼宣告了陣列之後變成SelectImg[0].Width = 20; 呢?從"->"變成"." 我想應該是基本觀念的問題~希望各位前輩不吝指教~

您好: 試試下面程式碼

Graphics::TBitmap *SelectImg[5];    void __fastcall mask(Graphics::TBitmap* pBMP)  //mask我用灰階效果取代
{
    pBMP->PixelFormat = pf24bit;
    BYTE *byPtr = NULL;
    BYTE byGray;
    for (int y=0; yHeight; y  )
    {
        byPtr = (BYTE*)pBMP->ScanLine[y];
        for (int x=0; xWidth; x  )
        {
            byGray = (byPtr[x*3] byPtr[x*3 1] byPtr[x*3 2])/3;
            byPtr[x*3  ] = byGray;
            byPtr[x*3 1] = byGray;
            byPtr[x*3 2] = byGray;
        }
    }
}    //---------------------------------------------------------------------------
void __fastcall TForm1::FormCreate(TObject *Sender)
{
    for (int i=0; i<5; i  )
    {
        SelectImg[i] = new Graphics::TBitmap;
        SelectImg[i]->LoadFromFile(IntToStr(i 1) ".bmp");
        //((TImage* )FindComponent("Image" IntToStr(i 1)))->Picture->Assign(SelectImg[i]);
        ((TImage* )FindComponent("Image" IntToStr(i 1)))->Canvas->Draw(0, 0, SelectImg[i]);
    }
    mask(SelectImg[0]);
    Image6->Picture->Assign(SelectImg[0]);
}
//---------------------------------------------------------------------------
void __fastcall TForm1::FormClose(TObject *Sender, TCloseAction &Action)
{
    for (int i=0; i<5; i  )
    {
        if (SelectImg[i] != 0)
        {
            delete SelectImg[i];
            SelectImg[i] = NULL;
        }
    }
}

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