Absolute C++ (4th Edition) part 63 ppt

... 628 Virtual Functions in C++ 629 Tip: The Virtual Property Is Inherited 636 Tip: When to Use a Virtual Function 636 Pitfall: Omitting the Definition of a Virtual Member Function 637 Abstract Classes ... in C++, we will use a simplified example from an application area other than drawing figures. ■ VIRTUAL FUNCTIONS IN C++ Suppose you are designing a record-keeping program for an...

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... is for the function declaration and the main part of the program to appear in one or more files, with the function declaration before the main part of the program, and for the function definition ... so we will place the function definitions after the main part of the program. If the full function definition is placed before the main part of the program, the function declaration can be...

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... used by C++ for plugging in an argument for a formal parameter when a function is invoked. There are two basic kinds of parameters and therefore two basic plugging-in mecha- nisms in C++. The ... next few subsections describe the call-by-reference mechanism in more detail and also explain the particular functions used in Display 4.2. ■ CALL-BY-REFERENCE MECHANISM IN DETAIL In most situatio...

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... P IZZA The large “economy” size of an item is not always a better buy than the smaller size. This is partic- ularly true when buying pizzas. Pizza sizes are given as the diameter of the pizza in inches. ... parameters 04_CH04.fm Page 145 Wednesday, August 13, 2003 12:49 PM Parameters 149 Display 4.5 Buying Pizza (part 1 of 2) 1 //Determines which of two pizza sizes is the best buy. 2 #incl...

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... do something like this. However, C++ overloading allows for a more elegant solution. In C++ you can simply use the same function name ave for both functions. In C++ you can use the following function ... << mpg(45, 2) << " miles per gallon"; When C++ sees the function call mpg(45, 2), which has two arguments of type int, C++ first looks for a function defin...

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... 0; } 04_CH04.fm Page 166 Wednesday, August 13, 2003 12:49 PM Testing and Debugging Functions 163 Display 4.9 Driver Program (part 1 of 2) 1 2 //Driver program for the function unitPrice. 3 #include <iostream> 4 ... rather than write a completely new program to test each function. For Display 4.9 Driver Program (part 2 of 2) S AMPLE D IALOGUE \ Enter diameter and price: 13 14.75 U...

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... 189 production figures for each department, such as the teaspoon department, soup spoon depart- ment, plain cocktail spoon department, colored cocktail spoon department, and so forth. More- over, ... PM Arrays in Functions 191 Display 5.4 Production Graph Program (part 3 of 4) 50 cout << "Enter number of units produced by each department.\n" 51 << "Append a negati...

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... 05_CH05.fm Page 219 Wednesday, August 13, 2003 12:51 PM 218 Arrays bers in the partially filled array. Since a partially filled array requires two arguments, the function will actually have ... function called deleteRepeats that has a partially filled array of characters as a formal parameter and that deletes all repeated letters from the array. Since a partially filled array requires tw...

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... Constructors 273 Display 7.2 Bank Account Class (part 5 of 5) 161 return static_cast<int>(amount); 162 } 163 //Uses cmath: 164 int BankAccount::centsPart(double amount) 165 { 166 double doubleCents ... of the const modifier is an all-or-nothing proposition. If you use const for one parameter of a particular type, then you should use it for every other parameter that has that type...

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... //negative cents. Negative $4.50 is represented as -4 and -50. 25 int dollarsPart(double amount) const; 26 int centsPart(double amount) const; 27 int round(double number) const; 28 }; 29 int main( ... //negative cents. Negative $4.50 is represented as -4 and -50. 25 int dollarsPart(double amount) const; 26 int centsPart(double amount) const; 27 int round(double number) const; 28 }; 29 int ma...

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