fig03_14.cpp

来自「经典vc教程的例子程序」· C++ 代码 · 共 25 行

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

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 );
}