fig03_14.cpp

这是C＋＋编程经典的书上实例的源代码。 （英文名是《C＋＋ how to program》第3版）

// Fig. 3.14: fig03_14.cpp
// Recursive factorial function
#include <iostream>

using std::cout;
using std::endl;

#include <iomanip>

using std::setw;

unsigned long factorial( unsigned long );

int main()
{
   for ( int i = 0; i <= 10; i++ )
      cout << setw( 2 ) << i << "! = " << factorial( i ) << endl;

   return 0;
}

// Recursive definition of function factorial
unsigned long factorial( unsigned long number )
{
   if ( number <= 1 )  // base case
      return 1;
   else                // recursive case
      return number * factorial( number - 1 );
}



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