mohammed

‫‪192‬‬ ‫ﺗﻌﺮﻳﻒ ﻃﺮﻳﻘﺔ ﻓﻲ اﻟﻔﺌﺔ ‪‘ CCar‬‬ ‫)‪Public Sub PrintRelatedPeople ( frmForm As Form‬‬ ‫‪ ” & Me.sCarModel‬اﻟﻤﻮدﻳﻞ‪frmForm.Print “:‬‬ ‫‪ ” & Me.objOwner‬اﻟﻤﺎﻟﻚ‪frmForm.Print “:‬‬ ‫‪ ” & Me. objDriver‬اﻟﺴﺎﺋﻖ‪frmForm.Print “:‬‬ ‫‪End Sub‬‬

‫ﻓﻌﻼ‪ ،‬اﻟﺒﺮﻣﺠﺔ آﺎﺋﻨﻴﺔ اﻟﺘﻮﺟﻪ ‪ OOP‬ﺑﺮﻣﺠﺔ ﻣﻤﺘﻌﺔ ﻟﻠﻐﺎﻳﺔ واﻗﺮب اﻟـﻰ اﻟﻌـﺎﻟﻢ اﻟﺤﻘﻴﻘـﻲ‬ ‫ﻣﻦ اﻟﺒﺮﻣﺠﺔ اﻻﺟﺮاﺋﻴﺔ اﻟﻤﻌﻘﺪة‪.‬‬ ‫ﻋﻼﻗﺔ ‪ 1‬اﻟﻰ ن‪:‬‬ ‫ﻗﺪ ﺗﻜﻮن هﻨﺎك اآﺜﺮ ﻣﻦ ﻋﻼﻗﺔ ﺑﻴﻦ ﻧﻔـﺲ اﻟﻜﺎﺋﻨـﺎت ﻟﺘﻤﺜـﻞ ﻋﻼﻗـﺔ اآﺜـﺮ ﺗﻌﻘﻴـﺪا ﺗﻌـﺮف‬ ‫ﺑﻌﻼﻗﺔ ‪ 1‬اﻟﻰ ن‪ ،‬ﺣﻴﺚ ﻳﺤﺘﻮي اﻟﻜﺎﺋﻦ ﻋﻠـﻰ ﻣﺠﻤﻮﻋـﺔ آﺎﺋﻨـﺎت ﻣـﻦ ﻧﻔـﺲ اﻟﻨـﻮع‪ .‬ﻓﻠـﻮ‬ ‫ﻋــﺪﻧﺎ اﻟــﻰ اﻟﻤﺜــﺎل اﻟﺴــﺎﺑﻖ‪ ،‬ﺳــﻨﻼﺣﻆ ان اﻟﺴــﻴﺎرة اﻟﻮاﺣــﺪة ‪ CCar‬ﻟﻬــﺎ ﻣﺎﻟــﻚ واﺣــﺪ‬ ‫‪ objOwner‬و ﺳﺎﺋﻖ واﺣﺪ ‪ ،objDriver‬ﻧﺴـﺘﻄﻴﻊ ﺗﻄـﻮﻳﺮ آـﺎﺋﻦ اﻟﺴـﺎﺋﻖ ﺑﺤﻴـﺚ ﻳﻤﻜـﻦ‬ ‫ﻟﻠﺴﻴﺎرة ان ﻳﻜﻮن ﻟﻬﺎ اآﺜﺮ ﻣﻦ ﺳﺎﺋﻖ –وﻟﺪ ﻧﻌﻤﺔ! ﻗـﺪ ﺗﺴـﺘﺨﺪم اﺳـﻠﻮب اﻟﻤﺼـﻔﻮﻓﺎت‬ ‫ﻟﺘﻌﻴﺪ ﺗﻌﺮﻳﻒ اﻟﻜﺎﺋﻦ ‪ objDriver‬آﻤﺎ ﻓﻲ اﻟﻜﻮد اﻟﺘﺎﻟﻲ‪:‬‬ ‫اﻟﻔﺌﺔ ‪‘ CCar‬‬ ‫‪Private m_objDrivers (5) As CPerson‬‬ ‫‪Public Property Get objDriver( iDriverNum As Integer ) As CPerson‬‬ ‫) ‪Set objDriver = m_objDrivers ( iDriverNum‬‬ ‫‪End Property‬‬ ‫)‪Public Property Set objDriver( iDriverNum As Integer, ByVal objNewValue As CPerson‬‬ ‫‪Set m_objDrivers ( iDriverNum ) = objNewValue‬‬ ‫‪End Property‬‬

‫ﺑﺎﻣﻜﺎﻧﻚ اﻟﻮﺻﻮل اﻟﻰ هﺬﻩ اﻟﺨﺎﺻﻴﺔ ﺑﻜﺘﺎﺑﺔ ﺷﻴﺌﺎ ﻣﺜﻞ‪:‬‬ ‫‪BMW.objOwner = Turki‬‬ ‫‪BMW.objDriver (0) = Abbas‬‬ ‫‪BMW.objDriver (1) = Ahmed‬‬ ‫‪BMW.objDriver (2) = Ali‬‬

‫‪Set‬‬ ‫‪Set‬‬ ‫‪Set‬‬ ‫‪Set‬‬ ‫…‬