Question #22526

(Summing the digits in an integer) Write a function that computes the sum of the digits in an integer. Use the following function header.
int sumDigits (long n)
Write a test program that prompts the user to enter an integer and display the sum of all its digits.

Expert's answer

#include <conio.h>

#include <iostream>

using namespace std;

int sumDigits(long n)

{

char digit;

int result = 0;

while (n != 0)

{

digit = n % 10;

result += digit;

n /= 10;

}

return result;

}

void main()

{

long n;

cout << "Enter an integer number: ";

cin >> n;

cout << "The sum of its digits is: " << sumDigits(n) << endl;

getch();

}

#include <iostream>

using namespace std;

int sumDigits(long n)

{

char digit;

int result = 0;

while (n != 0)

{

digit = n % 10;

result += digit;

n /= 10;

}

return result;

}

void main()

{

long n;

cout << "Enter an integer number: ";

cin >> n;

cout << "The sum of its digits is: " << sumDigits(n) << endl;

getch();

}

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