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zhannawk [14.2K]
2 years ago
7

Design a class called NumDays. The class’s purpose is to store a value that represents a number of work hours and convert it to

a number of days. For example, 8 hours would be converted to 1 day, 12 hours would be converted to 1.5 days, and 18 hours would be converted to 2.25 days. The class should have a constructor that accepts a number of hours, as well as member functions for storing and retrieving the hours and days. The class should also have the following overloaded operators:
+ addition operator: When two NumDays objects are added together, the overloaded + operator should return the sum of the two objects hours members.
-subtraction operator: When one NumDays object is subtracted from another, the overloaded- operator should return the difference of the two objects hours members.
++ prefix and postfix increment operators. These operators should increment the number of hours stored in that object. When incremented, the number of days should automatically be recalculated.
-- Prefix and postfix decrement operators. These operators should decrement the number of hours stored in that object. When decremented, the number of days should automatically be recalculated.
Computers and Technology
1 answer:
stepladder [879]2 years ago
3 0

Answer:

See explaination

Explanation:

#include <iostream>

using namespace std;

class NumDays{

int hours;

float day;

public:

NumDays()

{

hours=0;

day=0.0;

};

NumDays(int h)

{

hours=h;

day=float(h/8.0);

};

int getHour()

{

return hours;

}

float getDay()

{

return day;

}

NumDays operator +(NumDays obj)

{

int h=getHour()+obj.getHour();

NumDays temp(h);

return temp;

}

NumDays operator -(NumDays obj)

{

int h=getHour()-obj.getHour();

NumDays temp(h);

return temp;

}

const NumDays& operator++() //prefix

{

++hours;

day=float(hours/8.0);

return *this;

}

const NumDays& operator--() //prefix

{

--hours;

day=float(hours/8.0);

return *this;

}

const NumDays operator++(int) //postfix

{

NumDays temp(*this);

++hours;

day=float(hours/8.0);

return temp;

}

const NumDays operator--(int) //postfix

{

NumDays temp(*this);

--hours;

day=float(hours/8.0);

return temp;

}

};

int main()

{

NumDays obj(2),obj2(10),obj3,obj4;

obj3=obj2-obj;

cout<<"'obj3=obj2-obj'=> Day:"<<obj3.getDay()<<"##Hour:"<<obj3.getHour()<<"\n";

obj3=obj+obj2;

cout<<"'obj3=obj+obj2'=> Day:"<<obj3.getDay()<<"##Hour:"<<obj3.getHour()<<"\n";

obj4=obj3++;

cout<<"'obj4=obj3++' => Day:"<<obj4.getDay()<<"##Hour:"<<obj4.getHour()<<"\n";

obj4=++obj3;

cout<<"'obj4=++obj3' => Day:"<<obj4.getDay()<<"##Hour:"<<obj4.getHour()<<"\n";

obj4=obj3--;

cout<<"'obj4=obj3--' => Day:"<<obj4.getDay()<<"##Hour:"<<obj4.getHour()<<"\n";

obj4=--obj3;

cout<<"'obj4=--obj3' => Day:"<<obj4.getDay()<<"##Hour:"<<obj4.getHour()<<"\n";

};

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Answer:

The program to this question can be given as:

Program:

import java.util.*; //import package  

public class Person_detail //define class

{

public static void main(String ar[]) //define main function

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String Name,hobby,dream_Job; //declare variable.

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Scanner sc = new Scanner(System.in); //creating Scanner class object for user input.

System.out.print("Enter Your Name : "); //message  

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hobby = sc.next();

System.out.print("Enter Your aim: ");

aim = sc.next();

//print values.

System.out.println("Hello, my name is "+name+" and I am "+age);

System.out.println("years old.My hobby is playing "+hobby+".");

System.out.println("I want to be a "+aim+" when I grow up!");

}

}

Output:

Hello, my name is XXX and I am 21

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I want to be a cricketer when I grow up!.

Explanation:

In the above program firstly we import the package for user input. Then we declare a class that is Person_detail. In this class, we declare the main function. In the main function, we declare a variable that is name, hobby, aim, and age. In these variable first 3 variables datatype is string and age variable data type in integer. Then we create a scanner class object and take input from the user and print it into a paragraph.

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Write a method that takes a RegularPolygon as a parameter, sets its number of sides to a random integer between 10 and 20 inclus
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Answer:

import java.lang.Object

import java.lang.Math

public class RegularPolygon  extends java.lang.Object{

  public void randomize(RegularPolygon c){

       int min = 10, max1 = 20;

       double  min1 = 5, max1 = 12;

       double range = (max - min) + 1;

       double range1 = (max1 -min1) + 1

       int side = (Math.random() * range) + min;

       double len = (Math.random() * range1) + min1;

       c.setNumSides(side);

       c.setSideLength( len);

 }

 public static void main(String[] args) {

    RegularPolygon r = new RegularPloygon();

    randomize(r);

 }

}

Explanation:

The randomize method accepts a regular polygon class as its only parameter and assigns a random number of sides and the length of these sides with the 'Math.random' function.

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3 years ago
Overloading in methods are popular in programming, and why overloading is important.
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Answer:

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The overloading is important because it has the ability to design the multiple method by using similar name. It also provide the high flexibility to the programmers to call the same method in the data. overloading basically provide the high clarity in the code.

Overloading is used to achieved the compile time polymorphism.  

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Class abc // creating class

{

public:

int p;

void fun() // function fun with no parameter/

{

cout<<” hello “;

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{

p=a;

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}

};

int main() // main function

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abc ob; // creating object

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return 0;

}

Explanation:

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Answer:

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