CSc 1301 Lab #9 Topics: Scanner – user input, if-else, cumulative sum and product Problem 1: · Ask user to input any 5-digit positive integer value. Calculate the sum of digits of that number. ·...

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CSc 1301 Lab #9 Topics: Scanner – user input, if-else, cumulative sum and product Problem 1: · Ask user to input any 5-digit positive integer value. Calculate the sum of digits of that number. · Assume that the number is positive, integer, 5-digit. · Example: 29107 should calculate 2+9+1+0+7 and get 19 · Hint: Use the % operator to extract a digit from a number. · Use loop(s) Problem 2: · Write a program to find the prime numbers · Ask user to input the integer number · test the number whether it is a prime number or not · Then, print “true” or “false” depending on whether the number is prime or isn’t. · Hint: number is prime when is has exactly 2 factors: one and itself. By this definition, number 1 is a special case and is NOT a prime. · Use idea of user input, if-else, and loop to solve this problem. You can assume user inputs positive number. · Problem 3: · Ask user to input two integer parameters a, and b. · Assume that a is a positive integer (>0) and b is single-digit numbers from 0-9 inclusive. · Your program should print: · true if a contains b at among its digits, and · false otherwise. · For example when a is 3415, b is 1, should print true. · (Note: You can not use a String to solve this problem. We will learn Strings later) Problem 4: Write a program that shows the factors of 2 in a given positive integer (user input) in the range of [16,128]. For example, if user inputs 7, 18, 68, 120, the correctly working program should print the following: 7 = 7 18 = 2 * 9 68 = 2 * 2 * 17 120 = 2 * 2 * 2 * 15 Problem GCD, extra. Write a program called gcd that accepts two positive integers in the range of [32,256] as parameters and prints the greatest common divisor (GCD) of the two numbers. The GCD of two integers a and b is the largest integer that is a factor of both a and b. One efficient way to compute the GCD of two numbers is to use Euclid’s algorithm, which states the following: GCD (a, b) _ GCD (b, a % b) GCD (a, 0) _Absolute value of a Page 2 of 5

lab-9problems-5jvi3c1g.docx

Answered 1 days AfterMar 12, 2021

Answer To: CSc 1301 Lab #9 Topics: Scanner – user input, if-else, cumulative sum and product Problem 1: · Ask...

Sudipta answered on Mar 13 2021

151 Votes

Ans 1.
package richard;
import java.util.*;
public class digitSum {
    public static void main(String[] args) {

        //taking input using scanner class
        Scanner sc = new Scanner (System.in);
        System.out.print("Enter any 5 digit number: ");
        int num=sc.nextInt();
        int digit=0;
        int sum=0;
        //using while loop to take each digit and add to previous sum
        while (num>0) {
            digit=num%10;
            num=num/10;
            sum+=digit;
        }
        System.out.println(sum);
    }
}
Output Screenshot:
Ans 2.
package richard;
import java.util.Scanner;
public class prime {
    public static void main(String[] args) {

        //taking input using scanner
        Scanner sc= new Scanner(System.in);
        System.out.print("Enter a number: ");
        int num=sc.nextInt();
        int c=0;
        // using for loop to check if any number other than 1 and itself divides the number
        for(int...

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CSc 1301 Lab #9 Topics: Scanner – user input, if-else, cumulative sum and product Problem 1: · Ask user to input any 5-digit positive integer value. Calculate the sum of digits of that number. ·...

Answer To: CSc 1301 Lab #9 Topics: Scanner – user input, if-else, cumulative sum and product Problem 1: · Ask...

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