c02p059.txt

Data Abstraction & Problem Solving with C++源码

int fact(int n)
// ---------------------------------------------------
// Computes the factorial of a nonnegative integer.
// Precondition: n must be greater than or equal to 0.
// Postcondition: Returns the factorial of n; n is
// unchanged.
// ---------------------------------------------------
{
   if (n == 0)
      return 1;
   else
      return n * fact(n-1);
}  // end fact