#include<iostream>

using namespace std;

double length ( int n )
{
	if ( n == 2 )
		return 0.5;
	else 
		return ( length(n-1) + 1/n );
}

int main()
{
	double c;
	int cnum;
	cin >> c;
	while ( c != 0.00  )
	{
		cnum = 2;

		while ( length ( cnum ) < c )
		 cnum ++ ;

		cout << cnum << "\tcard(s)\n";

		cin >> c;
	}
	return 0;
}

• Re:为什么递归的返回值总是0.5？请帮忙 (21) scuttemp 2009-01-13 08:56:30
• 格式变下 (82) 332523 2009-01-22 15:56:00