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递归AC,其实图形是对称的,每次只考虑前1/3就OK了(附代码)

Posted by zjc0823 at 2010-05-07 10:43:33 on Problem 2876
#include <iostream>
using namespace std;

int f(int n)                    //3的n次幂
{
    int s=1,i;
    for(i=0;i<n;i++)
        s*=3;
    return s;
}

void cantor(int n)               //递归
{
    int i,x;
    if(n==0)
    {
        cout<<"-";
    }
    else
    {
        x=f(n-1);
        cantor(n-1);
        for(i=0;i<x;i++)
        {
            cout<<" ";
        }
        cantor(n-1);
    }
}

int main()
{
    int n,m;
    while(cin>>n)
    {
       cantor(n);
       cout<<endl;
    }
    return 0;
}

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