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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int factorialRE (long int num1);
  5.  
  6. int main()
  7. {
  8.    int i, num1, factorial; // definicja zmiennej typu int o nazwie num1...
  9.    num1 =0;
  10.    std::cout << "Enter the number ";
  11.    std::cin >> num1; // wczytujemy liczbę
  12. //cout << "The given numer is : " <<num1 <<std::endl;
  13.  
  14.    if (num1 >= 0) // factorial conditions, number must be positive (+)
  15.    {
  16.       cout << "The given number "<<num1<<" is positive I will count the factiorial ;)"<<std::endl;
  17.  
  18.    /* counts the factiorial */
  19.         if (num1==0)
  20.         {
  21.            factorial = 1;
  22.         }
  23.         else
  24.         {
  25.            factorial = 1;
  26.            for (i = 1; i <= num1; i++)
  27.            factorial = factorial * i;
  28.         }
  29.    //std::cout << "The "<<num1<<"! factiorial is "<<factorial<<std::endl;
  30.    std::cout <<"The "<<num1<<"! factiorial is: "<<factorialRE(num1)<<std::endl;
  31.  
  32.    }
  33.    else
  34.    {
  35.       std::cout << "The given number "<<num1<<" is negative I will not count the factiorial ;("<<std::endl;
  36.    }
  37.         return 0;
  38. }
  39.  
  40. int factorialRE (long int num1) //counts the factiorial recursive way
  41. {
  42.         int factorial;
  43.         if (num1==0)
  44.         {
  45.            return 1;
  46.         }
  47.         else
  48.         {
  49.            return num1 * factorialRE(num1 - 1);
  50.         }
  51. }
  52.  
  53.  
  54.  
Success #stdin #stdout 0s 16048KB
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Standard input is empty
stdout
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Enter the number The given number 0 is positive I will count the factiorial ;)
The 0! factiorial is: 1
https://ideone.com/Z098Uf
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
public

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