我正在编写一个C ++程序，它从外部文本文件中读取有关书籍的信息，将信息存储在一个数组中，并使用每本书的标题和价格写一个新文件。在编译时没有错误但是当我运行程序时，我得到一堆内存位置，弹出屏幕并出现错误
“主题1：EXC_BAD_ACCESS（代码2）”
如果重要的是我在intel mac上使用xcode。代码如下，有几个问题的屏幕截图。感谢
守则：
//main.cpp
include <iostream>
include <fstream>
include "Book.h"
include "textbook.h"
include "Name.h"
using namespace std;
int main()
{
string title, authorf, authorl, publisher, isbn, subject;
int pages, i = 0, j = 0;
float price, rentalp;
char code;
static int bookCount = 0, textbookCount = 0;
ifstream file1, file2;
ofstream newFile;
file1.open("/Users/TVaughn/Documents/School Stuff/Fall 2012/CS 246/In Class Programs/Book/Book/Data.txt", ios::in); //Opening the data.txt file to read from.
newFile.open("/Users/TVaughn/Documents/School Stuff/Fall 2012/CS 246/In Class Programs/Book/Book/Title.txt", ios::out); //Creating a new file to store titles & prices of all the books.
book bookList[3];
while (!file1.eof()) {
getline (file1, title, ',');
getline (file1, authorf, ',');
getline (file1, authorl, ',');
getline (file1, publisher, ',');
getline (file1, isbn, ',');
file1 >> pages;
file1.ignore();
file1 >> price;
file1.ignore();
file1 >> code;
file1.ignore(10, '\n');
book b1(title, authorf, authorl, publisher, pages, isbn, price, code);
bookList[i] = b1; //initalizing the first element of the array to b1
newFile << "Title: " << bookList[i].getTitle() << "\n" << "Price: " << bookList[i].getPrice() << "\n\n"; //storing the title and price of all the books in a new file called titles.
bookList[i].PrintBook();
i++;
bookCount++;
}
file1.close();
file2.open("/Users/TVaughn/Documents/School Stuff/Fall 2012/CS 246/In Class Programs/Book/Book/TextbookData.txt", ios::in); //Opening the TextbookData.txt file to read from.
textbook TbookList[2];
while (!file2.eof()) {
getline (file2, title, ','); //retrieving info from data.txt and storing that info into variables so the variable may be passed as arguments in my textbook object b2.
getline (file2, authorf, ',');
getline (file2, authorl, ',');
getline (file2, isbn, ',');
file2 >> pages;
file2.ignore();
file2 >> price;
file2.ignore();
getline(file2, subject, ',');
file2 >> code;
file2 >> rentalp;
file2.ignore(10, '\n');
textbook b2(title, authorf, authorl, publisher, pages, isbn, price, code, subject, rentalp);
TbookList[j] = b2; //initalizing the first element of the array to b2.
newFile << "Title: " << bookList[j].getTitle() << "\n" << "Price: " << bookList[j].getPrice() << "\n\n";
TbookList[j].PrintBook();
j++;
textbookCount++;
}
file2.close();
newFile.close();
cout << "Number of books: " << bookCount << "\nNumber of textbooks: " << textbookCount << endl;
book b3("C++ Data Structures", "Nell B.", "Dale", "Jones & Bartlett Publishers", 781, "9780763741587", 107.67, 'A'); //This line is used to test the exception handeling.
try {
b3.setPrice(price);
b3.setPages(pages);
}
catch (book::negativeNumber) {
cout << "Negative price was entered \n\n" << "End of program \n";
}
return 0;
}
//book.h
#include <iostream>
#include "Name.h"
#include <string>
using namespace std;
#ifndef BOOK_H
#define BOOK_H
class book
{
private:
string title;
Name aurthor;
string publisher;
string ISBN;
int pages;
float price;
char code;
public:
class negativeNumber{};
void setTitle(string);
void setAurthor(string f, string l);
void setPublisher(string);
void setISBN(string);
void setPages(int);
void setPrice(float);
void setCode(char);
string getTitle();
Name getAurthor();
string getPublisher();
string getISBN();
int getPages();
float getPrice();
char getCode();
void PrintBook();
book(); //default constructor
book(string, string, string, string, int, string, float, char);
~book(); //Destructor
};
#endif
//Book.cpp
#include <iostream>
#include <string>
#include "Book.h"
#include "Name.h"
using namespace std;
book::book() {
title = "Southern Charm";
Name::Name();
publisher = "Impact Publishers";
pages = 223;
ISBN = "234-232-10009045";
price = 14.99;
code = 'L';
}
book::book(string the_title, string f, string l, string the_pub, int page_num, string the_ISBN, float the_price, char the_c)
{
title = the_title;
//Name(f, l);
aurthor.setfName(f);
aurthor.setlName(l);
publisher = the_pub;
pages = page_num;
ISBN = the_ISBN;
price = the_price;
code = the_c;
}
book::~book()
{
}
void book::setTitle(string t)
{
title = t;
}
void book::setAurthor(string f, string l)
{
aurthor.setfName(f);
aurthor.setlName(l);
}
void book::setPublisher(string pub)
{
publisher = pub;
}
void book::setISBN(string ISBN_num)
{
ISBN = ISBN_num;
}
void book::setPages(int p) {
if (pages > 0)
pages = p;
else
throw negativeNumber();
}
void book::setPrice(float cost) {
if (price >= 0) //This is called exception handling.
price = cost;
else
throw negativeNumber();
}
void book::setCode(char c) {
code = c;
}
string book::getTitle() {
return title;
}
Name book::getAurthor(){
return aurthor;
}
string book::getPublisher() {
return publisher;
}
string book::getISBN(){
return ISBN;
}
int book::getPages() {
return pages;
}
float book::getPrice() {
return price;
}
char book::getCode() {
return code;
}
void book::PrintBook() {
cout << "Title: " << getTitle() << "\n" << "Aurthor: ";
getAurthor().printName();
cout << "Publisher: " << getPublisher() << "\n" << "Pages: " << getPages() << "\n" << "ISBN: " << getISBN() << "\n" << "Price: " << getPrice() << "\n" << "Code: " << getCode() << "\n \n \n";
}
答案 0 :(得分：0)
以下几点突然出现在我身上：
std::ios_base::eof()只能确定先前读取失败的原因。解决问题并重试。