Computer Applications
Write a program by using a class with the following specifications:
Class name — Calculate
Instance variables:
- int num
- int f
- int rev
Member Methods:
- Calculate(int n) — to initialize num with n, f and rev with 0 (zero)
- int prime() — to return 1, if number is prime
- int reverse() — to return reverse of the number
- void display() — to check and print whether the number is a prime palindrome or not
Answer
import java.util.Scanner;
public class Calculate
{
private int num;
private int f;
private int rev;
public Calculate(int n) {
num = n;
f = 0;
rev = 0;
}
public int prime() {
f = 1;
if (num == 0 || num == 1)
f = 0;
else
for (int i = 2; i <= num / 2; i++) {
if (num % i == 0) {
f = 0;
break;
}
}
return f;
}
public int reverse() {
int t = num;
while (t != 0) {
int digit = t % 10;
rev = rev * 10 + digit;
t /= 10;
}
return rev;
}
public void display() {
if (f == 1 && rev == num)
System.out.println(num + " is prime palindrome");
else
System.out.println(num + " is not prime palindrome");
}
public static void main(String args[]) {
Scanner in = new Scanner(System.in);
System.out.print("Enter number: ");
int x = in.nextInt();
Calculate obj = new Calculate(x);
obj.prime();
obj.reverse();
obj.display();
}
}Variable Description Table
Program Explanation
Output
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