假設我建構一個副程式 int  CatchSide(  int CPointX,int  CPointY)
{

.............;
}
但我輸出的OUTPUT也要有兩個甚至以上的值
那我再呼叫這個副程式的時候，有辦法叫出我個別我需要的OUTPUT嗎?
還是都只能一個?

(1)回傳值可以用一個struct來做.
(2)將所需要回傳的值, 以call by address 或
call by reference 的方式以參數傳入.

傳struct結構~那要怎麼接...
不好意思~我不是沒有做功課~是真有點聽不懂您的意思>"<

===================引 用 jow 文 章===================
(1)回傳值可以用一個struct來做.
(2)將所需要回傳的值, 以call by address 或
call by reference 的方式以參數傳入.

Call By Value, Call By Reference, Call By Address
是指傳遞參數的形式...^_^

[code cpp]
//---------------------------------------------------------------------------
#ifndef fMainH
#define fMainH
//---------------------------------------------------------------------------
#include
#include
#include
#include <Forms.hpp><br />//---------------------------------------------------------------------------
struct CPoint
{
int X;
int Y;
};
//---------------------------------------------------------------------------
class TForm1 : public TForm
{
__published:
TButton *Button1;
TListBox *ListBox1;
void __fastcall Button1Click(TObject *Sender);
private:
int CallByValue(int x, int y);
CPoint CallByReference(int &x, int &y);
CPoint* CallByAddress(int *x, int *y);
public:
__fastcall TForm1(TComponent* Owner);
};
//---------------------------------------------------------------------------
extern PACKAGE TForm1 *Form1;
//---------------------------------------------------------------------------
#endif
[/code]


[code cpp]
//---------------------------------------------------------------------------
#include
#pragma hdrstop
#include "fMain.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner): TForm(Owner)
{
}
//---------------------------------------------------------------------------
int TForm1::CallByValue(int x, int y)
{
return x y ;//改變的x, y的值不影響叫用端
}
//---------------------------------------------------------------------------
CPoint TForm1::CallByReference(int &x, int &y)
{
CPoint ret;//要回傳的struct
ret.X=x ;
ret.Y=y ;
return ret;//傳入的 x, y值被改變,並傳回叫用端
}
//---------------------------------------------------------------------------
CPoint* TForm1::CallByAddress(int *x, int *y)
{
CPoint *ret = new CPoint;//要回傳的struct, 叫用端要負責delete
ret->X=(*x) ;
ret->Y=(*y) ;
return ret;//傳入的 x, y值被改變,並傳回叫用端
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button1Click(TObject *Sender)
{
AnsiString S;
int x=10, y=20;
//Call By Value
int z = CallByValue(x,y);
S.sprintf("x=%d, y=%d, z=%d",x,y,z);
ListBox1->Items->Add(S);
ListBox1->Items->Add("");
//Call By Reference
CPoint p=CallByReference(x, y);
S.sprintf("x=%d, y=%d, p.X=%d, p.Y=%d",x,y,p.X,p.Y);
ListBox1->Items->Add(S);
ListBox1->Items->Add("");
//Call By Address
CPoint *Q=CallByAddress(&x, &y);
try{
S.sprintf("x=%d, y=%d, Q->X=%d, Q->Y=%d",x,y,Q->X,Q->Y);
ListBox1->Items->Add(S);
ListBox1->Items->Add("");
}
__finally{
if(Q) delete Q;//叫用端要負責delete
}
}
//---------------------------------------------------------------------------
[/code]

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阿~~大大一次給三種方法
小弟我真是受用不盡~~

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