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inna [77]
3 years ago
13

Write a program, named NumDaysLastNameFirstName.java, which prompts the user to enter a number for the month and a number for th

e year. Using the information entered by the user and selection statements, display how many days are in the month. Note: In the name of the file, LastName should be replaced with your last name and FirstName should be replaced with your first name. When you run your program, it should look similar to this:
Computers and Technology
1 answer:
Alexandra [31]3 years ago
3 0

Answer:

Explanation:

The following code is written in Java and uses Switch statements to connect the month to the correct number of days. It uses the year value to calculate the number of days only for February since it is the only month that actually changes. Finally, the number of days is printed to the screen.

import java.util.Scanner;

public class NumDaysPerezGabriel {

   public static void main(String args[]) {

       int totalDays = 0;

       Scanner in = new Scanner(System.in);

       System.out.println("Enter number for month (Ex: 01 for January or 02 for February): ");

       int month = in.nextInt();

       System.out.println("Enter 4 digit number for year: ");

       int year = in.nextInt();

       switch (month) {

           case 1:

               totalDays = 31;

               break;

           case 2:

               if ((year % 400 == 0) || ((year % 4 == 0) && (year % 100 != 0))) {

                   totalDays = 29;

               } else {

                   totalDays = 28;

               }

               break;

           case 3:

               totalDays = 31;

               break;

           case 4:

               totalDays = 30;

               break;

           case 5:

               totalDays = 31;

               break;

           case 6:

               totalDays = 30;

               break;

           case 7:

               totalDays = 31;

               break;

           case 8:

               totalDays = 31;

               break;

           case 9:

               totalDays = 30;

               break;

           case 10:

               totalDays = 31;

               break;

           case 11:

               totalDays = 30;

               break;

           case 12:

               totalDays = 31;

       }

       System.out.println("There are a total of " + totalDays + " in that month for the year " + year);

   }

}

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Following are the code to this question:

#include <iostream>//header file

#include<math.h>//header file

using namespace std;

class Quadratic//defining a class Quadratic  

{

private:

double a,b,c;//defining a double variable

public:

Quadratic()//defining default constructor

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}

double getA() //defining a get method  

{

return a;//return value a

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void setA(double a)//defining a set method to hold value in parameter

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void setB(double b)//defining a set method to hold value in parameter  

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void setC(double c)//defining a set method to hold value in parameter

{

this->c = c;//assigning value in c variable

}

double Evaluate(double x)//defining a method Evaluate to hold value in parameter

{

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}

double numberOfReal()//defining a method numberOfReal to calculates the real roots

{

return (b*b)-(4*a*c);//return real roots

}

void findroots()//defining a method findroots

{

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if(d<0)//use if block to check value of d less than 0

cout<<"Equation has no real roots"<<endl;//print message

else

{

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double r2=(-b-sqrt(numberOfReal()))/(2*a);//holding root value r2

if(r1==r2)//defining if block to check r1 equal to r2

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}

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{

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};

int main()//defining main method  

{

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q.findroots();//calling method findroots

cout<<q.Evaluate(-1);//calling method Evaluate that prints its value

return 0;

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Output:

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16

The equation has two real roots that are -0.2 and -1

0

Explanation:

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In the next step, the get and set method is defined that holds and returns the quadratic value, and "Evaluate, numberOfReal, findroots, and print" in the evaluate method a double variable is used as a parameter that returns evaluated value.

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and use a conditional statement to check its value, and in the print method, it prints the quadratic equation.

In the main method, the lass object it calls the parameterized constructor and other methods.

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