《数据结构》严蔚敏 算法6.14

// exam1.cpp : 定义控制台应用程序的入口点。
//

#include "stdafx.h"
#include <iostream>
#include <vector>
using namespace std;

void print_set(vector<char> s,int num)
{
	cout<<"Subset Num"<<num<<": ";
	vector<char>::iterator it=s.begin();
	while(it!=s.end())
	{
		cout<<*it<<" ";
		it++;
	}
	cout<<endl<<endl;
}

void power_of_set(vector<char> A,vector<char> B,int n)
{
	static int num=0;
	if(n==A.size())
	{
		num++;
		print_set(B,num);
		return;
	}
	B.push_back(A[n]);
	power_of_set(A,B,n+1);
	B.erase(B.end()-1);
	power_of_set(A,B,n+1);
	
	return;
}

int main(void)
{
	char ch[3]={'a','b','c'};
	vector<char> A(ch,ch+3);
	vector<char> B;

	power_of_set(A,B,0);

	system("pause");
	return 0;
}