1.cpp

@@ -1,11 +1,11 @@
 #include <iostream>
-int sum(int a, int b) {
+int factorial(int n) {
-    return a + b;
+    return (n == 1 || n == 0) ? 1 : n * factorial(n - 1);
 }
 int main() {
-    int x, y;
+    int num;
-    std::cout << "Enter two numbers: ";
+    std::cout << "Enter a number: ";
-    std::cin >> x >> y;
+    std::cin >> num;
-    std::cout << "Sum: " << sum(x, y) << std::endl;
+    std::cout << "Factorial: " << factorial(num) << std::endl;
     return 0;
 }