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pentagon [3]
3 years ago
10

Write a Java application that uses the Math class to determine the answers for each of the following: a. The square root of 37 b

. The sine and cosine of 300c. The value of the floor, ceiling, and round of 22.8 d. The larger and the smaller of the character ‘D’ and the integer 71 e. A random number between 0 and 20 (Hint: The random() method returns a value between 0 and 1; you want a number that is 20 times larger.) Save the application as MathTest.java.'
Computers and Technology
1 answer:
gayaneshka [121]3 years ago
5 0

Answer:

import java.util.Random;

public class MathTest {

   public static void main(String[] args) {

       int a = 37, b = 300;

       double c = 22.8;

       int max;

       System.out.println("The Square root of 37 is "+ Math.sqrt(a));

       System.out.println("The Sine of 300 is " + Math.sin(b) + " and the cosine is "+ Math.cos(b));

       System.out.println("The Floor, Ceiling and Round Value of 22.8 respectively are "+Math.floor(c)+", "+Math.ceil(c)

               +", "+Math.round(c));

       max = Math.max((int)'D',71);

       System.out.println("The Maximum between D and 71 is " +max );

       Random rand = new Random();

       int RandValue = rand.nextInt(20);

       System.out.println("A random Number between 0 and 20 is "+ RandValue);

   }

}

Explanation:

In order to get the square root of the number 37, the square root function is called by the statement Math.sqrt(a) since the value 37 has been assigned to a. Method calls are also applied to find the cosine, sine, floor, round and ceiling values for the respective variables.

To determine the maximum between the character 'D' and the integer 71, we first cast the character 'D' to an integer using this (int)'D'. Then we make the Method call Math.max( ).

To generate a random variable between 0 and 20, we first make an object of the class Random we use this object to obtain a random number between 0 and 20 by specifying the bound to 20 during the method call.

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Write a program that prompts the user to input a number. The program should then output the number and a message saying whether
Gala2k [10]

Answer:

Following is the program in C++ Language

#include <iostream> // header file

using namespace std; // namespace std

int main() // main method

{

   int n;  // variable declaration

   cout<<" Please enter the number :";

   cin>>n; // Read the number

   if(n>0) // check the condition when number is positive

   {

cout<<n<<endl<<"The number is Positive"; // Display number

   }

  else if(n<0) // check the condition when number is Negative

  {

cout<<n<<endl<<"The number is Negative";// Display number

  }

  else // check the condition when number is Zero

  {

cout<<n<<endl<<"The number is Zero";// Display number

  }

   return 0;

  }

Output:

Please enter the number:

64

The number is Positive

Explanation:

Following are the description of the program

  • Declared a variable "n" of int type.
  • Read the value of "n" by user.
  • Check the condition of positive number by using if block statement .If n>0 it print the number is positive.
  • Check the condition of negative number by using else if block statement If n<0 it print the number is negative.
  • Finally if both the above condition is fail it print the message " The number is Zero"

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3 years ago
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Assume there are 15 students registered for a history class. You will need to declare an array of the StudentType structure to c
andrezito [222]

Answer:

#include <iostream>

using namespace std;

struct StudentType{

   string studentName;

   int studentId;

}

int n;

char answer[20];

int main(){

   cout<< "Enter the size of the array: ";

   cin >> n;

   StudentType *student = new StudentType(n);

   for (int i = 0; i < n; i++){

       int name;

       int number;

       cin>> name;

       cin >> number;

       student[i].studentName = name;

       student[i].studentId = number;

   }

   for (int i = 0; i < 20; i++){

       cout<< "Enter answers: ";

       cin >> ans;

       answer[i] = ans;

   }

}

Explanation:

The C++ source code has three global variables namely, answer which is an array of character data type, StudentType which is a structure data type and the integer variable n. The main function declares and initializes the dynamic-spaced student array of the structure datatype with the n variable.

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