算法程序设计题~~高手帮忙啊~~~

#include <iostream>
#include <iomanip>
#include <ctime>
#include <cstdlib>
using namespace std;

void quick(int a[],int lf,int rg)
{
    int tmp;
    int lf_idx;
    int rg_idx;
    int t;
    //1：第一个键值为a[lf]
    if(lf<rg)
    {
        lf_idx=lf+1;
        rg_idx=rg;
        while(1)
        {
            int i,j;
            for(i=lf+1;i<=rg;i++)   //由左向右找出一个键值大于 d[lf]数
            {
                if(a[i]>=a[lf])
                {
                    lf_idx=i;
                    break;
                }
                lf_idx++;
            }
            for(j=rg;j>=lf+1;j--)    //由右向左找出一个键值小于 d[lf]数
            {
                if(a[j]<=a[lf])
                {
                    rg_idx=j;
                    break;
                }
                rg_idx--;
            }
            if(lf_idx<rg_idx)         //若lf_idx<rg_idx
            {
                tmp=a[lf_idx];
                a[lf_idx]=a[rg_idx];
                a[rg_idx]=tmp;
            }
            else
            {
                break;
            }
        }
        if(lf_idx>=rg_idx)
        {
            tmp=a[lf];
            a[lf]=a[rg_idx];
            a[rg_idx]=tmp;
            quick(a,lf,rg_idx-1);
            quick(a,rg_idx+1,rg);
        }
    }     
}

int bin_search(int a[],int val,int x)
{
    int high,low,mid;
    low=0;
    high=x-1;   
    while(low<=high&val!=-1)
    {
        mid=(low+high)/2;
        if(val<a[mid])
        {
            high=mid-1;
        }
        else if(val>a[mid])
        {
            low=mid+1;
        }
        else
            return mid;
    }
    return -1;
}

int main()
{
    char b;
    int a[10];
    int i,j;
    while(1)
    {
        cin>>b;
        if(b==35)
            break;
        else
        {
            cout<<"请输入十个数:"<<endl;
            for(i=0;i<10;i++)
            {
                cin>>a[i];
            }
            //快速排序
            quick(a,0,9);
            for(i=0;i<10;i++)
            {
                cout<<a[i]<<" ";
            }   
            cout<<endl;
            int val;
            cin>>val;
            int x=bin_search(a,val,10);
            cout<<x<<endl;
        }
    }
    return 0;
}