digui.cpp

递归的小程序

#include"iostream.h"
int n;

int cows(int x)
{
	int t,i;
	if(x>n-4)
		return 0;
	t=0;
	i=x+4;
	while(i<=n)
	{
		t=t+cows(i);
		i++;
	}
	t+=n-x-3;
	return t;
}

void main()
{
	while(1)
	{
		cout<<"Input years";
		cin>>n;
		if(n==0)
			break;
		cout<<"cows number:"<<1+cows(1)<<endl;
	}
}