错误-全排列

#include <iostream>

using namespace std;

int result[8]={0,1,2,3,4,5,6,7};

void exch(int *result,int l,int r)
{
		int tmp=result[l];
		result[l]=result[r];
		result[r]=tmp;
}

void quan(int *result,int left,int right)
{
		if(left<=right){
				if(left==right){
						cout<<result[left];
						return;
				}	
				else{
						cout<<result[left];
						quan(result,left+1,right);
				}
		}
		
}

int main()
{
		for(int i=0;i<8;++i){
				quan(result,0,7);
				exch(result,0,i);
				cout<<endl;
		}
		system("pause");
}