Question

Code needed in C++

(nOT IN STEP BY STEP EITHER)

  

Write a recursive function that computes the sum of the digits in an integer. Use the following function header:

int sumDigits(int n)

For example, sumDigits(234) returns 2 + 3 + 4 = 9.

Write a test program that prompts the user to enter an integer and displays its sum.

Answer 1

Source Code:

Output:

Code in text format (See above images of code for indentation):

#include <iostream>
using namespace std;

/*main function*/
int main()
{
   /*function prototype*/
   int sumDigits(int);
   /*variables*/
   int n,sum;
   /*read an integer from user*/
   cout<<"Enter an integer: ";
   cin>>n;
   /*function call*/
   sum=sumDigits(n);
   /*print sum*/
   cout<<"The sum of digits is: "<<sum;
   return 0;
}
/*function definition*/
int sumDigits(int n)
{
   if(n==0)
       return n;
   /*recursive call by adding digits*/
   else
       return (n%10)+sumDigits(n/10);
}