Question

input a number of digit display the sum of all digit

Answer 1

#include<stdio.h>
#include<cstdlib>

usingnamespace std;

intmain() {
int n;
scanf ("%d", &n);
int res = 0;
if (n < 0) n = -n;
while (n) {
res += n % 10;
n /= 10;
}
printf ("%d
", res);
return 0;
}

OR

#include<stdio.h>
#include<cstdlib>
#include<iostream>
#include<string>

usingnamespace std;

intmain() {
string s;
getline(cin, s);
int res = 0;
for (int i = 0; i < s.length(); i++)
if (s[i] >= '0' && s[i] <= '9')
res += s[i] - '0';
cout << res << endl;
return 0;
}