initial commit

C++/lesson2/task4.cpp

@@ -0,0 +1,17 @@
+#include <iostream>
+
+int main() {
+    int sum = 0;
+    int num;
+    std::cin >> num;
+    if (num < 0) {
+        std::cout << "You are a bad person!\n";
+        return 0;
+    }
+    while (num != 0) {
+        int digit = num % 10;
+        num /= 10;
+        sum += digit;
+    }
+    std::cout << sum << '\n';
+}