Вывести список книг запрашиваемого автора

#include <iostream>
#include <cstdio>
#include <cstring>
#include <cstdlib>
using namespace std;
struct library    
{
    string owner;       
    string book;        
};
/*void NameBook(const char* str, library* ob)
{
    cout << "book name: ";
    for (int i = 0; i < 6; i++) {
 
        if (!strcmp((ob[i].get_aut()), str)) ob[i].show();
    }
    cout << '\n';
}*/
 
int main()
{
    setlocale(LC_ALL, "rus");
    bool state;
    char s[80];
    const int n = 3;
    library books;
    books.owner = "Steven King";
    books.book = "It", "The Green Mile", "Misery", "The Shining", " Doctor Sleep";
    library books[n];
    books.owner = "Tolstoy";
    books.book = "Childhood", "War and Peace", "Sunday", "Anna Karenina", "The Caucasian Prisoner", " After the Ball";
    for (int i = 0; i < n; i++)
    {
        cout << "book name: ";
        gets(books[i].book);
    }
}

#include <iostream>
#include <string>
#include <cstdlib>
using namespace std;
struct library    
{
    string owner;       
    string book;        
};
int main()
{
    const int n = 11;
    library books[n]={
        "Steven King", "It",
        "Steven King", "The Green Mile", 
        "Steven King", "Misery", 
        "Steven King", "The Shining", 
        "Steven King", " Doctor Sleep",
        "Tolstoy","Childhood", 
        "Tolstoy","War and Peace", 
        "Tolstoy","Sunday", 
        "Tolstoy","Anna Karenina", 
        "Tolstoy","The Caucasian Prisoner", 
        "Tolstoy"," After the Ball" 
    };
    string autor;
    cout<<"Enter autor:";
    getline(cin,autor);
    string title;
    cout<<"Enter title:";
    getline(cin,title);
    int count = 0;
    for (int i = 0; i < n; i++)
    {
        if( books[i].owner==autor)
        {
            if(books[i].book==title)
            {
                cout<<autor<<' '<<title<<endl;
                count=-1;
                break;
            }
            count++;
        }
    }
    if(count==0)
        cout<<"No books of "<<autor<<endl;
    else if(count!=-1)
    {
        for (int i = 0; i < n; i++)
            if( books[i].owner==autor)
                cout<<autor<<' '<<books[i].book<<endl;
    }
    cin.get();
    return 0;
}

#include <iostream>
#include <cstdlib>
#include <string>
using namespace std;
 
struct Library    
{
    string surname;       
    string book;        
};
 
int main()
{
    int k=0, p=0;
    const int n=11;    
    Library s[n] = {{"King", "It"},
                    {"King", "The Green Mile"},
                    {"King", "Misery"},
                    {"King", "The Shining"},
                    {"King", "Doctor Sleep"},
                    {"Tolstoy", "Childhood"},
                    {"Tolstoy", "War and Peace"},
                    {"Tolstoy", "Sunday"},
                    {"Tolstoy", "Anna Karenina"},
                    {"Tolstoy", "The Caucasian Prisoner"},
                    {"Tolstoy", "After the Ball"}};    
    
    string find_surname, find_book;
    cout << "Find surname: "; 
    getline(cin,find_surname);
    cout << "Find book: "; 
    getline(cin,find_book);    
    
    for (int i = 0; i < n; i++)
    {
        if(s[i].surname==find_surname && s[i].book==find_book)
        {
            k=1;
            cout << s[i].surname << "  " << s[i].book << "\n"; 
            break;
        }       
    }
    
    if(k==0)
    {
        for (int i = 0; i < n; i++)        
            if(s[i].surname==find_surname)
            {
                p=1;
                cout << s[i].book << "\n";
            }    
    }
    
    if(k==0 && p==0) cout << "Book is absent\n";
    
system("pause");
return 0;
}