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function TableTop.getmaterial(): string; begin getmaterial := material; end; procedure TableTop.setmaterial( m: string); begin material := m; end; procedure TableTop.displaydetails; begin writeln('Table Top: ', self.getlength(), ' by ' , self.getwidth()); writeln('Material: ', self.getmaterial()); end; procedure TableTop.draw(); var i, j: integer; begin for i:= 1 to length do begin for j:= 1 to width do write(' * '); writeln; end; writeln('Material: ', material); end; begin tt1.setlength(3); tt1.setwidth(7); tt1.setmaterial('Wood'); tt1.displaydetails(); writeln; writeln('Calling the Draw method'); tt1.draw(); end. Following are the important points, which should be noted down: The object Tabletop has inherited all the members of the Rectangle object. There is a draw method in TableTop also. When the draw method is called using a TableTop object, TableTop's draw gets invoked. There is an implicit instance named self that refers to the current instance of the object. TUTORIALS POINT Simply Easy Learning Page 150
When the above code is compiled and executed, it produces the following result: Table Top: 3 by 7 Material: Wood Calling the Draw Method * * * * * * * * * * * * * * * * * * * * * Material: Wood TUTORIALS POINT Simply Easy Learning Page 151
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Pascal Tutorial
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ABOUT THE TUTORIAL Pascal Tutorial
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Declaring Constants ...............
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Accessing Two-Dimensional Array Ele
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CHAPTER 1 Pascal Overview This chap
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CHAPTER 2 Environment This section
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Name and version of text editor can
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Pascal Hello World Example Followin
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CHAPTER 4 Basic Syntax You have see
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The Pascal character set consists o
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Type Declarations: The type declara
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Subrange Types Subrange types allow
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Pascal programming language also al
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Enumerated Variables You have seen
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CHAPTER 7 Constants This section sh
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CHAPTER 8 Operators This section sh
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Checks if the value of left operand
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When the above code is compiled and
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program beBitwise; var a, b, c: int
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CHAPTER 9 Decision Making This sect
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Example: Let us try a complete exam
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Example: Let us try a complete exam
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Nested if-then Statements It is alw
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The following rules apply to a case
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Flow Diagram: Example: The followin
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CHAPTER 10 Loops This section shows
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Flow Diagram: Here, key point of th
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Flow Diagram Example: program forLo
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Example: program repeatUntilLoop; v
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Example: program exBreak; var a: in
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Example: program exContinue; var a:
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Example: The following program illu
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Defining a Function: In Pascal, a f
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variable named m. The variable m is
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program exRecursion; var num, f: in
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procedure swap(x, y: integer); var
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Now, let us extend the program litt
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Let us change the previous example
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12 function AnsiStrLower( Str: PCha
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CHAPTER 15 Boolean This section sho
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CHAPTER 16 Arrays This section show
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Initializing Arrays In Pascal, arra
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Two-Dimensional Arrays: The simples
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The following example declares and
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Passing Arrays as Subprogram Argume
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Following are some valid pointer de
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To check for a nil pointer, you can
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program exPointers; const MAX = 3;
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program exPointers; const MAX = 3;
Page 107 and 108: Value of num = 3000 Value available
Page 109 and 110: CHAPTER 18 Records This section sho
Page 111 and 112: (* book 2 specification *) Book2.ti
Page 113 and 114: type record-ptr = ^ record-name; re
Page 115 and 116: (* book 1 specification *) Book1.ti
Page 117 and 118: Example: The following example woul
Page 119: Set Operators You can perform the f
Page 122 and 123: CHAPTER 21 File Handling This secti
Page 124 and 125: When the above code is compiled and
Page 128 and 129: Reads data from a file into memory
Page 130 and 131: Reads from file into variable and g
Page 132 and 133: CHAPTER 22 Memory Management This s
Page 134 and 135: Resizing and Releasing Memory When
Page 136 and 137: Frees dynamically allocated memory
Page 138 and 139: Returns segment 37 procedure SetMem
Page 140 and 141: eadkey; clrscr; gotoxy(20,3); write
Page 144 and 145: Program DateDemo; uses sysutils; va
Page 146 and 147: 14 function EncodeDate( Year: Word;
Page 148 and 149: 39 function TimeStampToDateTime( co
Page 150 and 151: Objects This section shows the conc
Page 152 and 153: type Rectangle = object private len
Page 156 and 157: egin r1.init(3, 7); writeln('Draw a
Page 160 and 161: Classes This section shows the clas
Page 162 and 163: {$mode objfpc} // directive to be u
Page 164 and 165: Constructors and Destructors for Pa
Page 166 and 167: program inheritanceExample; {$MODE
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