Types 请求“kniga”中的成员“title”，该成员属于非类类型“main（）：：BookList[（（unsigned int）（（int）k））]”

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#include<iostream>
#include<string.h>
using namespace std;

int main ()
{
int i,k=6;       
struct BookList
{
       string title;
       string author;
       string publisher;
       int year;
};   BookList kniga[k];

for(i=0;i<5;i++)
cout<<"Vavedete dannite za kniga "<<i<<endl;
cout<<"Zaglavie ";
getline(cin,kniga.title[i]);
cout<<"---------------------"<<endl;
cout<<"Avtor ";
getline(cin,kniga.author[i]);
cout<<"---------------------"<<endl;
cout<<"Izdatelstvo ";
getline(cin,kniga.publisher[i]);
cout<<"---------------------"<<endl;
cout<<"Godina ";
getline(cin,kniga.year[i]);
cout<<"---------------------"<<endl;

//------------------

#include<iostream>
#include<string.h>
using namespace std;

int main ()
{
int i,k=6;       
struct BookList
{
       string title;
       string author;
       string publisher;
       int year;
};   BookList kniga[k];

for(i=0;i<5;i++)
cout<<"Vavedete dannite za kniga "<<i<<endl;
cout<<"Zaglavie ";
getline(cin,kniga.title[i]);
cout<<"---------------------"<<endl;
cout<<"Avtor ";
getline(cin,kniga.author[i]);
cout<<"---------------------"<<endl;
cout<<"Izdatelstvo ";
getline(cin,kniga.publisher[i]);
cout<<"---------------------"<<endl;
cout<<"Godina ";
getline(cin,kniga.year[i]);
cout<<"---------------------"<<endl;

//------------------- 系统暂停； 返回0； } 首先，我很抱歉这个问题我知道它被问了很多次，但我需要你的帮助我做错了什么，找不到什么