Searching files by queries !

File Searching

#include <fstream>
#include <iostream>
#include <string>
#include <vector>
using namespace std;
//Searching files by queries !
int main()
{
    //ifstream cin("file_searching.txt");
    int n=0,m=0;
    vector<string>v;
    vector<string>vf;
    while(cin>>n)
    {
        if(!v.empty()) cout<<endl;  //blank after cases except last one
        v.clear();vf.clear();   //files and queries
        string s;
        for(int i=0;i<n;i++)
        {
            cin>>s;
            v.push_back(s);
        }
        cin>>n;
        for(int i=0;i<n;i++)
        {
            cin>>s;
            vf.push_back(s);
        }
        for(int i=0;i<vf.size();i++)
        {
            string bs=vf[i],as=vf[i];   //string before and after '*'
            int x=vf[i].find("*");  //index of '*'
            bs.erase(bs.begin()+x,bs.end());
            as.erase(as.begin(),as.begin()+x+1);
            for(int j=0;j<v.size();j++)
            {
                int b=v[j].find(bs);int a=v[j].find(as);    //index of bs and as in the string
                if(x==0) b=x; if(x==vf[i].length()-1) a=v[j].length();  //begin or end of the string
                if(b==0&&a==v[j].length()-as.length()&&bs.length()<=a)  //include bs and as while no crosses
                {
                    m++;    //matched files
                    if(m>1) cout<<", ";
                    cout<<v[j];
                }
            }
            if(m==0) cout<<"FILE NOT FOUND";
            m=0;cout<<endl;
        }
    }
    return 0;
}