cpp-programming/OOP1-Lab3/Digits.cpp at main · whshi574/cpp-programming · GitHub

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//U1910049 Rastam Zokirov

//Lab assignment #4

//Program to input a number and then calculate sum of its digits.

#include <iostream>

#include<string>

#include<cctype>

using namespace std;

void DigitsSum() {

cout << "Please enter a number that I can sum of their digit" << endl;

string CusInput;

int Sum = 0;

bool Isvaild = 1;

while (1) {

cin >> CusInput;

for (char c : CusInput) {

if (isdigit(c)) {

int num = static_cast<int>(c - '0');

Sum = Sum + num;

}

else {

cout << "The input is invalid, please enter again" << endl;

Isvaild = 0;

break;

}

Isvaild = 1;

}

if (Isvaild) {

cout << "The sum of the digits is " << Sum << endl;

break;

}

int main() {

DigitsSum();

return 0;

}

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