Page 445 - Computer science 868 Class 12
P. 445
public ArmNum(int num)
{
n = num;
l = 0;
for(int i =n; i!=0; i/=10)
l++;
}
public int sum_pow(int i)
{
if(i<10)
return (int)Math.pow(i,l);
return (int)Math.pow(i%10,l)+sum_pow(i/10);
}
void isArmstrong()
{
l=Integer.toString(n).length();
int sum;
if(n==sum_pow(n))
{
System.out.println(n+" IS AN ARMSTRONG NUMBER");
}
else
{
System.out.println(n+" IS NOT AN ARMSTRONG NUMBER");
}
}
public static void main(String[] args)
{
int num=0,sum=0,noOfDigits=0;
Scanner sc=new Scanner(System.in);
System.out.println("ENTER THE NUMBER");
num=sc.nextInt();
ArmNum obj = new ArmNum(num);
obj.isArmstrong();
}
}
7. The following function Mystery( ) is a part of some class. What will the function Mystery( ) return when the value of num=43629,
x=3 and y=4 respectively? Show the dry run/working. [ISC 2019]
int Mystery (int num, int x, int y)
{
if(num<10)
return num;
else
{
int z = num % 10;
if(z%2 == 0)
return z*x + Mystery (num/10, x, y);
else
return z*y + Mystery(num/10, x, y);
}
}
443
Recursion 443

