Java problem:.An integer number was given and you had to write a function that would return the unique numbers of the number e.g. 156-3, 155-2.

Question

Java problem:.An integer number was given and you had to write a function that would return the unique numbers of the number e.g. 156->3, 155->2.

Sigiloso · Accepted Answer

#include 
#include 

int uniqueNumCount(int num)
{
   unordered_set uniqueNum;


   while(num)
   {
      int digit = num%10;
      num = num/10;
      uniqueNum.insert(digit);
   }

    return uniqueNum.size();
}

int main()
{
   int num = 123;
   cout << "Unique number in:" << num <<" is " <<  uniqueNumCount(num) << endl;

   num = 122;
   cout << "Unique number in:" << num <<" is " <<  uniqueNumCount(num) << endl;

   return 0;
}

Flavius · Answer

import java.util.Arrays;

public class numberOfNumbers
{
	public static void main(String args[])
	{
		int input = 23444550;
		
		int differentNumbers[] = new int[10];

		int counter = 1;
		while (input != 0)
		{
			int x = input % 10;

			if (!isInArray(differentNumbers, x))
			{
				differentNumbers[counter - 1] = x;
				counter++;
			}
			input = input/10;
		}
		System.out.println(counter);
		System.out.println(Arrays.toString(differentNumbers));
	}

	public static boolean isInArray(int[] a, int x)
	{
		for (int i = 0; i < a.length; i++)
		{
			if (a[i] == x) return true;
		}
		return false;
	}

}

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