Question

Write a c++ program that reads numbers from the user, and prints a table showing how many times each digit appears in each number. The user should be able to enter more than one number to be tested for repeated digits. The program should terminate when the user enters a number that is less than 0. Here is a sample output:

Enter a number (-1 to end this loop): 41271092

Digit: 0 1 2 3 4 5 6 7 8 9

Occurrences: 1 2 2 0 1 0 0 1 0 1

Enter a number (-1 to end this loop): 21272092

Digit: 0 1 2 3 4 5 6 7 8 9

Occurrences: 1 1 4 0 0 0 0 1 0 1

Enter a number (-1 to end this loop): 222345

Digit: 0 1 2 3 4 5 6 7 8 9

Occurrences: 0 0 3 1 1 1 0 0 0 0

Enter a number (-1 to end this loop): 98798

Digit: 0 1 2 3 4 5 6 7 8 9

Occurrences: 0 0 0 0 0 0 1 2 2

Enter a number (-1 to end this loop): -1

Answer 1

Here to store digit count array is used. Each index of array stores corresponding digit occurence .

C++ CODE

#include<iostream>
using namespace std;
// COUNT THE OCCURANCE DIGITS OF A NUMBER , USING ARRAY AND ITS INDEX POSITION
//IF A DIGIT 0 IS FOUND THEN 0 INDEX OF ARRAY WILL INCRMENT. THEN PRINT THE ARRAY
int main()
{
   int num; // NU,BER
   int x[10]; //ARRAY TO STORE DIGIT COUNT
   int i,d; // TEMPORARY VAR
   while(1) // LOOP UNTIL USER ENTERS -1
   {
       cout<<"\nEnter a numbber : ";
       cin>>num;
       if(num==-1) // CHECK IF -1 THEN LOOP BREAKS
           break;

       for(i=0; i<10; i++) // INITALLY ASSIGN 0 TO EACH ARRAY ELEMENTS
           x[i]=0;
          
       while (num> 0)
       {
           d=num % 10; // GET INDIVIDUAL DIGIT OF NUMBER
           x[d]++;           // INCREMENT SAME INDEX OF ARRAY, IF DIGIT GET 1 THEN 1 INDEX WILL BE INCREMENTED REPEATEDLY
           num = num / 10; // DECREASE THE NUMBER FROM RIGHT SIDE
       }

       cout<<"\nDigits : ";
       for(i=0; i<10; i++) // PRINT DIGITS
           cout<<i<<" ";
       cout<<"\nOccurrences : ";
       for(i=0; i<10; i++) // PRINT ARRAY THAT CONTAINS THE DIGIT COUNT
           cout<<x[i]<<" ";
   }
   return 0;
} // MAIN END

SCREEN SHOT CODE

SCREEN SHOT OUTPUT