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Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Indicate each error or mistake in this code

 

```cpp class Point { private: int xCoord; int yCoord; public: Point (int x, int y) { xCoord = x; yCoord = y; } // Overloaded + operator void operator+(const &Point Right) { xCoord += right.xCoord; yCoord += right.yCoord; } … Other member functions follow … }; ``` **Explanation:** This C++ code defines a class named `Point`, which models a point in a two-dimensional space with `x` and `y` coordinates. - **Private Members:** - `int xCoord;`: An integer representing the x-coordinate of the point. - `int yCoord;`: An integer representing the y-coordinate of the point. - **Public Members:** - `Point (int x, int y)`: A constructor that initializes the x and y coordinates with the given values. - `void operator+(const &Point Right)`: An overloaded `+` operator function that allows two `Point` objects to be added together. It updates the current object's `xCoord` and `yCoord` by adding the respective coordinates from another `Point` object, `Right`. Further member functions are indicated but not defined in the excerpt. These would provide additional functionality to the `Point` class.
Transcribed Image Text:```cpp class Point { private: int xCoord; int yCoord; public: Point (int x, int y) { xCoord = x; yCoord = y; } // Overloaded + operator void operator+(const &Point Right) { xCoord += right.xCoord; yCoord += right.yCoord; } … Other member functions follow … }; ``` **Explanation:** This C++ code defines a class named `Point`, which models a point in a two-dimensional space with `x` and `y` coordinates. - **Private Members:** - `int xCoord;`: An integer representing the x-coordinate of the point. - `int yCoord;`: An integer representing the y-coordinate of the point. - **Public Members:** - `Point (int x, int y)`: A constructor that initializes the x and y coordinates with the given values. - `void operator+(const &Point Right)`: An overloaded `+` operator function that allows two `Point` objects to be added together. It updates the current object's `xCoord` and `yCoord` by adding the respective coordinates from another `Point` object, `Right`. Further member functions are indicated but not defined in the excerpt. These would provide additional functionality to the `Point` class.
```cpp class Box { private: double width; double length; double height; public: Box(double w, l, h) { width = w; length = l; height = h; } // Overloaded prefix ++ operator void operator++() { ++width; ++length; } // Overloaded postfix ++ operator void operator++(int) { width++; length++; } … Other member functions follow … }; ``` ### Explanation: This code defines a C++ class named `Box`, which represents a three-dimensional box with private member variables for `width`, `length`, and `height`. #### Constructor: - `Box(double w, l, h)` initializes a new instance of the `Box` class, with parameters `w`, `l`, and `h` representing the width, length, and height, respectively. #### Operator Overloading: - **Prefix Increment Operator (`++`)**: - `void operator++()` is an overloaded operator that increases the `width` and `length` by one unit each when the prefix increment operator is used. - **Postfix Increment Operator (`++(int)`)**: - `void operator++(int)` is an overloaded operator that increases the `width` and `length` by one unit each when the postfix increment operator is used. #### Additional Notes: - The ellipsis (`…`) at the end indicates that there are other member functions in the class, but they are not listed here.
Transcribed Image Text:```cpp class Box { private: double width; double length; double height; public: Box(double w, l, h) { width = w; length = l; height = h; } // Overloaded prefix ++ operator void operator++() { ++width; ++length; } // Overloaded postfix ++ operator void operator++(int) { width++; length++; } … Other member functions follow … }; ``` ### Explanation: This code defines a C++ class named `Box`, which represents a three-dimensional box with private member variables for `width`, `length`, and `height`. #### Constructor: - `Box(double w, l, h)` initializes a new instance of the `Box` class, with parameters `w`, `l`, and `h` representing the width, length, and height, respectively. #### Operator Overloading: - **Prefix Increment Operator (`++`)**: - `void operator++()` is an overloaded operator that increases the `width` and `length` by one unit each when the prefix increment operator is used. - **Postfix Increment Operator (`++(int)`)**: - `void operator++(int)` is an overloaded operator that increases the `width` and `length` by one unit each when the postfix increment operator is used. #### Additional Notes: - The ellipsis (`…`) at the end indicates that there are other member functions in the class, but they are not listed here.
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