私のプログラムは、タイトルと著者のリストを含むファイルから入力を受け取るように設計されています。ファイルは次のようになります。
タイトル 関連する著者 次のタイトル 関連する著者 等
私が抱えている問題は、showBooksByTitle関数とshowBooksByAuthor関数にあります。現在、このコードは完全一致のみを返し、空の改行といくつかのスペースと（）を含む新しい行を出力します。
もちろん、どんな助けでも大歓迎です。これは私の最初の年のプログラミングです。問題になる可能性のあるものを除外しないように、安全のためにコード全体を含めました。
#include <iostream>
#include<string>
#include<fstream>
#include<cstring>
using namespace std;
struct Book {
string title;
string author;
};
const int ARRAY_SIZE = 1000;
Book books [ARRAY_SIZE];
int loadData (string);
void showAll (int);
int showBooksByAuthor (int, string);
int showBooksByTitle (int, string);
int main() {
//Declare variables
string pathname;
string title;
string name;
string word;
int count;
char response;
//ask user for pathname
cout << "What is the path of the library file? ";
cin >> pathname;
cout << endl;
count = loadData(pathname);
//input data into arrays
loadData(pathname);
cout << endl << count << " records loaded successfully." << endl << endl;
//Show user menu
cout << "Please enter Q to Quit, A to search for the Author, T to search for the Title, "
<< endl << "or S to Show all: ";
cin >> response;
switch(response) {
case 'q':
break;
case 'Q':
break;
case 'a':
cout << endl << "Please enter author's name: ";
cin >> name;
showBooksByAuthor(count, name);
break;
case 'A':
cout << endl << "Please enter author's name: ";
cin >> name;
showBooksByAuthor(count, name);
break;
case 't':
cout << endl << "Please enter all or part of the title: ";
cin >> title;
showBooksByTitle(count, title);
break;
case 'T':
cout << endl << "Please enter all or part of the title: ";
cin >> title;
showBooksByTitle(count, title);
break;
case 's':
cout << endl;
showAll(count);
break;
case 'S':
cout << endl;
showAll(count);
break;
default:
cout << endl << "Invaled input, please try again: ";
break;
}
//pause and exit
cout << endl;
system("PAUSE");
return 0;
}
int loadData(string pathname) {
int i = 0;
int j = 0;
ifstream library;
//open file, if not successful, output error message
library.open(pathname.c_str());
if (!library.is_open()) {
cout << "Unable to open input file." << endl;
return -1;
}
//reads title and author from file into designated string
//this is assuming title comes first and author comes after
while(!library.eof()) {
getline(library, books[i].title);
getline(library, books[i].author);
i++;
}
return i;
}
void showAll (int count) {
for (int i = 0; i < count; i++) {
cout << books[i].title << " (" << books[i].author << ")" << endl;
}
}
int showBooksByAuthor(int count, string name) {
int found;
for(int n = 0; n < 28; n++) {
found = name.find(books[n].author);
if(found != string::npos) {
cout << endl << books[n].title << " (" << books[n].author << ")" << endl;
}
}
return 0;
}
int showBooksByTitle (int count, string title) {
int found;
for(int n = 0; n < 28; n++) {
found = title.find(books[n].title);
if(found !=string::npos) {
cout << endl << books[n].title << " (" << books[n].author << ")" << endl;
}
}
return 0;
}