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icang [17]
3 years ago
11

#Write a function called is_composite. is_composite should #take as input one integer. It should return True if the #integer is

composite, False if the integer is not not #composite. You may assume the integer will be greater than #2 and less than 1000.
Computers and Technology
1 answer:
malfutka [58]3 years ago
3 0

Answer:

// A optimized school method based C++ program to check  

// if a number is composite.  

#include <bits/stdc++.h>  

using namespace std;  

bool isComposite(int n)  

{  

// Corner cases  

if (n <= 1) return false;  

if (n <= 3) return false;  

// This is checked so that we can skip  

// middle five numbers in below loop  

if (n%2 == 0 || n%3 == 0) return true;  

for (int i=5; i*i<=n; i=i+6)  

 if (n%i == 0 || n%(i+2) == 0)  

 return true;  

return false;  

}  

// Driver Program to test above function  

int main()  

{  

isComposite(11)? cout << " true\n": cout << " false\n";  

isComposite(15)? cout << " true\n": cout << " false\n";  

return 0;  

}

Explanation:

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Write an if/else statement that compares the double variable pH with 7.0 and makes the following assignments to the int variable
levacccp [35]

Answer:

if (pH<7.0){

          neutral=0;

          base=0;

          acid=1;

      }

      else if (pH>7.0){

          neutral=0;

          base=1;

          acid=0;

      }

      else if (pH==7.0){

          neutral=1;

          base=0;

          acid=0;

      }

Explanation:

As required by the question, if and else statements have been used to test the value of the pH and assign the apropriate values to the variables neutral, base and acid.

The code snippet below can be used to prompt the user to enter values for pH

<em>import java.util.Scanner;</em>

<em>public class pHTest {</em>

<em>   public static void main(String[] args) {</em>

<em>      Scanner scr = new Scanner(System.in);</em>

<em>       System.out.println("Enter a value for the pH");</em>

<em>       int neutral, base, acid;</em>

<em>       double pH = scr.nextDouble();</em>

<em> if (pH<7.0){</em>

<em>           neutral=0;</em>

<em>           base=0;</em>

<em>           acid=1;</em>

<em>       }</em>

<em>       else if (pH>7.0){</em>

<em>           neutral=0;</em>

<em>           base=1;</em>

<em>           acid=0;</em>

<em>       }</em>

<em>       else if (pH==7.0){</em>

<em>           neutral=1;</em>

<em>           base=0;</em>

<em>           acid=0;</em>

<em>       }</em>

<em>} }</em>

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Answer:

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Create a TeeShirt class for Toby’s Tee Shirt Company. Fields include:
Ainat [17]

Answer:

Here is the TeeShirt class:

public class TeeShirt{  //class name

   private int orderNumber;  // private member variable of type int of class TeeShirt to store the order number

   private String size;  // to store the size of tshirt

   private String color;  //  to store the color of shirt

   private double price;  // to store the price of shirt

   public void setOrderNumber(int num){  //mutator method to set the order number

       orderNumber = num;     }    

   public void setColor(String color){  //mutator method to set the color

       this.color = color;        }      

       

     public void setSize(String sz){  //mutator method to set the shirt size

   size = sz;  

   if(size.equals("XXXL") || size.equals("XXL")){  //if shirt size is XXL or XXXL

       price = 22.99;  // set the price to 22.99 if shirt size is XXL or XXXL

   }else{  //for all other sizes of shirt

       price = 19.99;     }  }  //sets the price to 19.99 for other sizes

   public int getOrderNumber(){  //accessor method to get the order number stored in orderNumber field

       return orderNumber;     }  //returns the current orderNumber

   public String getSize(){  //accessor method to get the size stored in size field

       return size;     }  //returns the current size

   public String getColor(){  //accessor method to get the color stored in color field

       return color;     }  //returns the current color

   public double getPrice(){  //accessor method to get the price stored in price field

       return price;      }  } //returns the current price

Explanation:

Here is the sub class CustomTee:

public class CustomTee extends TeeShirt {  //class CustomTee that inherits from class TeeShirt

private String slogan;   //private member variable of type String of class CustomTee to store slogan

public void setSlogan(String slgn) {  //mutator method to set the slogan

slogan = slgn; }

public String getSlogan() {  //accessor method to get the slogan stored in slogan field

return slogan;}  } //returns the current slogan

Here is DemoTees.java

import java.util.*;

public class DemoTees{  //class name

public static void main(String[] args)  {  //start of main method

TeeShirt tee1 = new TeeShirt();  //creates object of class TeeShirt named tee1

TeeShirt tee2 = new TeeShirt(); //creates object of class TeeShirt named tee2

CustomTee tee3 = new CustomTee(); //creates object of class CustomTee named tee3

CustomTee tee4 = new CustomTee();  //creates object of class CustomTee named tee4

tee1.setOrderNumber(100);  //calls setOrderNumber method of class TeeShirt using object tee1 to set orderNumber to 100

tee1.setSize("XXL");  //calls setSize method of class TeeShirt using object tee1 to set size to XXL

tee1.setColor("blue");  //calls setColor method of class TeeShirt using object tee1 to set color to blue

tee2.setOrderNumber(101);  //calls setOrderNumber method of class TeeShirt using object tee2 to set orderNumber to 101

tee2.setSize("S");  //calls setSize method of class TeeShirt using object tee2 to set size to S

tee2.setColor("gray");  //calls setColor method of class TeeShirt using object tee2 to set color to gray

tee3.setOrderNumber(102);   //calls setOrderNumber method of class TeeShirt using object tee3 of class CustomTee to set orderNumber to 102

tee3.setSize("L");  //calls setSize method of class TeeShirt using object tee3 to set size to L

tee3.setColor("red");  //calls setColor method of class TeeShirt using object tee3 to set color to red

tee3.setSlogan("Born to have fun");  //calls setSlogan method of class CustomTee using tee3 object to set the slogan to Born to have fun

tee4.setOrderNumber(104);  //calls setOrderNumber method of class TeeShirt using object tee4 of class CustomTee to set orderNumber to 104

tee4.setSize("XXXL");  //calls setSize method to set size to XXXL

tee4.setColor("black");  //calls setColor method to set color to black

tee4.setSlogan("Wilson for Mayor");  //calls setSlogan method to set the slogan to Wilson for Mayor

display(tee1);  //calls this method passing object tee1

display(tee2);  //calls this method passing object tee2

displayCustomData(tee3);  //calls this method passing object tee3

displayCustomData(tee4);  }   //calls this method passing object tee4

public static void display(TeeShirt tee) {  //method display that takes object of TeeShirt as parameter

System.out.println("Order #" + tee.getOrderNumber());  //displays the value of orderNumber by calling getOrderNumber method using object tee

System.out.println(" Description: " + tee.getSize() +  " " + tee.getColor());  //displays the values of size and color by calling methods getSize and getColor using object tee

System.out.println(" Price: $" + tee.getPrice()); }  //displays the value of price by calling getPrice method using object tee

public static void displayCustomData(CustomTee tee) {  //method displayCustomData that takes object of CustomTee as parameter

display(tee);  //displays the orderNumber size color and price by calling display method and passing object tee to it

System.out.println(" Slogan: " + tee.getSlogan());  } } //displays the value of slogan by calling getSlogan method using object tee

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