fork download
copy 
  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5.     int n;
  6.     int factorial = 1.0;
  7.     cout << "Input number: ";
  8.     cin >> n;
  9.     if (n < 0)
  10.         cout << "Error! Invalid input";
  11.     else {
  12.         for(int i = 1; i <= n; ++i) {
  13.             factorial *= i;
  14.         }
  15.         cout << "Factorial of " << n << " = " << factorial;    
  16.     }
  17.  
  18.     return 0;
  19. }
Success #stdin #stdout 0.01s 5432KB
comments (?)
stdin
copy 
5
stdout
copy 
Input number: Factorial of 5 = 120
https://ideone.com/6OogtD
language:
C++ 4.3.2 (gcc-4.3.2)
created:
1 year ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!