class implementation file -- Rectangle.cpp class Rectangle { #include #include "Rectangle.h" using namespace std; private: double width; double length; public: void setWidth (double); void setLength (double) ; double getWidth() const; double getLength() const; double getArea () const; } ; // set the width of the rectangle void Rectangle::setWidth (double w) { width = w; } // set the length of the rectangle void Rectangle::setLength (double l) { length l; //get the width of the rectangle double Rectangle::getWidth() const { return width; // more member functions here

class implementation file -- Rectangle.cpp class Rectangle { #include #include "Rectangle.h" using namespace std; private: double width; double length; public: void setWidth (double); void setLength (double) ; double getWidth() const; double getLength() const; double getArea () const; } ; // set the width of the rectangle void Rectangle::setWidth (double w) { width = w; } // set the length of the rectangle void Rectangle::setLength (double l) { length l; //get the width of the rectangle double Rectangle::getWidth() const { return width; // more member functions here

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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C++ programming Chapter(s) Covered: Chapter 1-8 Concepts tested by the program: Working with one dimensional parallel arrays Use of functions Use of loops and conditional statements Project Description The Lo Shu Magic Square is a grid with 3 rows and 3 columnsshown below. The Lo Shu Magic Square has the following properties: The grid contains the numbers 1 – 9 exactly. Each number 1 – 9must not be used more than once. So, if you were to add up thenumbers used, The sum of each row, each column and each diagonal all add upto the same number, Write a program that simulates a magic square using 3 onedimensional parallel arrays of integer type. Each one the arrays corresponds to a row of the magicsquare. The program asks the user to enter the values of the magicsquare row by row and informs the user if the grid is a magicsquare or not. See the sample outputs for more clarification. Project Specifications Input for this project: Values of the grid (row by row) Output for this…
C++
C++
#include <string>#include <iostream>#include <vector>class Snack{public:Snack(std::string, float, bool);int set_price(float);void set_expired(bool);void set_name(std::string);std::string name() const{return name_;}float price() const{return price_;}bool expired() const{return expr_;}int how_many_for_ten();private:std::string name_;float price_;bool expr_;};void SortByPrice(std::vector<Snack>&,bool); Task: Define the public function int Snack::set_price(float price) : If the value passed by price is smaller than 0 the function should return -2. If the value of price is greater or equal to 0, proceed as follows: If the value passed by price is smaller than the current value of price_, the function should assign price to price_ and return -1. If the value passed by price is larger than the current value of price_, the function should assign price to price_ and return 1. If price is equal to price_, the function should assign price to price_ and return…
Computer Science c++ help comment code please. Complex has multiple parameters to overload i think. class Complex{public: Complex(); //There are no parameters because... Complex(double); //There is one parameter because... Complex(double, double);//There are two parameters because... double get_Real(); void set_Real(double); double get_Imaginary(); void set_Imaginary(double); friend ostream& operator << (ostream& out, Complex& r); //explain friend istream& operator >> (istream& in, Complex& r);//explainprivate: double real; double imaginary;}; ostream& operator << (ostream& out, Complex& r) //{ double a = r.get_Real(); double b = r.get_Imaginary(); if (a != 0)out << a; if (b < 0) out << "-" << abs(b) << "i"; if (b > 0 && b != 1) out << "+" << b << "i"; if (b == 0) out << "0"; if (b == 1 && a != 0) out << "+" <<…
int class Inventory { std::vector<Item*> m_Items; static unsigned int m_ItemsMade; void CreateItem() { std::string name = "Item " + std::to_string(m_ItemsMade); m_Items.push_back(new Item(name.c_str(), 100 * m_ItemsMade)); ++m_ItemsMade; } public: Inventory() { CreateItem(); CreateItem(); CreateItem(); } void Print() const { size_t* nSize = new size_t(m_Items.size()); std::cout << "_____INVENTORY_____\n"; for (unsigned int i = 0; i < *nSize; ++i) { m_Items[i]->Print(); } } }; GetValidatedInt(const char* strMessage, int nMinimumRange = 0, int nMaximumRange = 0); This function should first display the provided message to the screen then use cin to get an int from the user. Error check and validate to ensure a legal integer was entered. If not, clear the cin buffer using clear() and ignore() and try again (Note: the buffer still needs to be cleared even if this step was successful). If a legal integer was entered, check its value to see if it is within the…
C++ complete and create magical square #include <iostream> using namespace std; class Vec {public:Vec(){ }int size(){return this->sz;} int capacity(){return this->cap;} void reserve( int n ){// TODO:// (0) check the n should be > size, otherwise// ignore this action.if ( n > sz ){// (1) create a new int array which size is n// and get its addressint *newarr = new int[n];// (2) use for loop to copy the old array to the// new array // (3) update the variable to the new address // (4) delete old arraydelete[] oldarr; } } void push_back( int v ){// TODO: if ( sz == cap ){cap *= 2; reserve(cap);} // complete others } int at( int idx ){ } private:int *arr;int sz = 0;int cap = 0; }; int main(){Vec v;v.reserve(10);v.push_back(3);v.push_back(2);cout << v.size() << endl; // 2cout << v.capacity() << endl; // 10v.push_back(3);v.push_back(2);v.push_back(3);v.push_back(4);v.push_back(3);v.push_back(7);v.push_back(3);v.push_back(8);v.push_back(2);cout…
class temporary { public: void set(string, double, double); void print(); double manipulate(); void get(string&, double&, double&); void setDescription(string); void setFirst(double); void setSecond(double); string getDescription() const; double getFirst()const; double getSecond()const; temporary(string = "", double = 0.0, double = 0.0); private: string description; double first; double second; }; I need help writing the definition of the member function set so the instance varialbes are set according to the parameters. I also need help in writing the definition of the member function manipulation that returns a decimal with: the value of the description as "rectangle", returns first * second; if the value of description is "circle", it returns the area of the circle with radius first; if the value of the description is "cylinder", it returns the volume of the cylinder with radius first and height second; otherwise, it returns with the value -1.
python regular expressions
Q1 function myFunc() { let a = 10; if (true) { Q3 } } let a = 5; console.log(a); Q4 console.log(a); Q2 const square = num => num * num; console.log(square(3) + 5); myFunc(); let x = 30; let y "200"; console.log(x+y); const nums = [10, 20, 8, 17]; nums.filter(e=> e > 10); console.log(nums); Q5 const nums = [30, 35, 42, 20, 15]; console.log(nums.every (num => num > 20)); January 15
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class Artist{StringsArtist(const std::string& name="",int age=0):name_(name),age_(age){}std::string name()const {return name_;}void set_name(const std::string& name){name_=name;}int age()const {return age_;}void set_age(int age){age_=age;}virtual std::string perform(){return std::string("");}private:int age_;std::string name_;};class Singer : public Artist{public:Singer():Artist(){};Singer(const std::string& name,int age,int hits);int hits() const{return hits_;}void set_hits(int hit);std::string perform();int operator+(const Singer& rhs);int changeme(std::string name,int age,int hits);Singer combine(const Singer& rhs);private:int hits_=0;};int FindOldestandMostSuccess(std::vector<Singer> list); Task: Implement the function int Singer::changeme(std::string name,int age,int hits) : This function should check if the values passed by name, age and hits are different than those stored. And if this is the case it should change the values. This should be done by…