Question

please I need help with the question:

Problem: Write a C++ program that reads each character from a user input, extracts the character if it is a digit, and calculates the sum of all the digits. The program stops reading the user input when the new line character ‘\n’ is encountered. For the output of the program, you should print each digit extracted from the user input and the sum of all the digits.
(*The main difference between “cin >> c” and “cin.get(c)” is that “cin >> c” skips the whitespace characters such as a tab (\t), blank, newline (\n). But “cin.get(c)” extracts every character including the whitespace characters.)

What to use:
- cin.get(c)

Answer 1

Hi, Plesae find my program.

Please let me know in case of any issue:

#include <iostream>
#include <ctype.h> // isdigit(c) function

using namespace std;

int main(){

   char c; // char variable to take user input

   int sum = 0; // to stroe sum of all character digits

   cin.get(c); // taking first input

   while( c != '\n'){

       if(isdigit(c)){
           sum = sum + (c - '0');
       }
       // when you enter any character and hit enter then '\n'(newline) character also get stored in buffer
       // so before taking any other character from user you need to clear unnecessary new line character from buffer
       // otherwise it reads new line character from buffer as next input instead from user
       cin.ignore(); // ignoring current new line character
       // getting other character input
       cin.get(c);
   }

   cout<<"Sum of all digit characters: "<<sum<<endl;

   return 0;
}