我只需要一些调试帮助(C++)。我遇到了多个不确定如何解决的问题
I just need some debugging help (C++). I am getting multiple issues that I'm unsure how to fix
如果你们能帮助修复我的代码，我将永远感激。
这些是Visual Studio 2013不断向我发布的错误。
1>------ Build started: Project: PA2, Configuration: Debug Win32 ------
1> Main.cpp
1>filepath(71): error C2146: syntax error : missing ')' before identifier 'i'
1>filepath(71): error C2061: syntax error : identifier 'i'
1>filepath(71): error C2059: syntax error : ')'
1>filepath(73): error C2143: syntax error : missing '}' before ';'
1>filepath(73): error C2064: term does not evaluate to a function taking 1
arguments
1>filepath(74): error C2146: syntax error : missing ';' before identifier 'endl'
1>filepath(74): warning C4551: function call missing argument list
1>filepath(75): error C2676: binary '[' : 'std::ofstream' does not define this
operator or a conversion to a type acceptable to the predefined operator
1>filepath(75): error C2228: left of '.ISBN' must have class/struct/union
1>filepath(77): error C2676: binary '[' : 'std::ofstream' does not define this
operator or a conversion to a type acceptable to the predefined operator
1>filepath(77): error C2228: left of '.Author' must have class/struct/union
1>filepath(79): error C2676: binary '[' : 'std::ofstream' does not define this
operator or a conversion to a type acceptable to the predefined operator
1>filepath(79): error C2228: left of '.Title' must have class/struct/union
1>filepath(81): error C2676: binary '[' : 'std::ofstream' does not define this
operator or a conversion to a type acceptable to the predefined operator
1>filepath(81): error C2228: left of '.Quantity' must have class/struct/union
1>filepath(83): error C2676: binary '[' : 'std::ofstream' does not define this
operator or a conversion to a type acceptable to the predefined operator
1>filepath(83): error C2228: left of '.Price' must have class/struct/union
1>filepath(84): warning C4804: '>' : unsafe use of type 'bool' in operation
1>filepath(92): error C2046: illegal case
1>filepath(97): error C2059: syntax error : ';'
1>filepath(98): error C2440: '=' : cannot convert from 'nullptr' to 'int'
1> A native nullptr can only be converted to bool or, using
reinterpret_cast, to an integral type
1>filepath(101): error C2046: illegal case
1>filepath(129): error C2676: binary '[' : 'std::ofstream' does not define this
operator or a conversion to a type acceptable to the predefined operator
1>filepath(129): error C2228: left of '.ISBN' must have class/struct/union
1>filepath(131): error C2676: binary '[' : 'std::ofstream' does not define this
operator or a conversion to a type acceptable to the predefined operator
1>filepath(131): error C2228: left of '.Quantity' must have class/struct/union
1>filepath(137): error C2676: binary '[' : 'std::ofstream' does not define this
operator or a conversion to a type acceptable to the predefined operator
1>filepath(139): error C2676: binary '[' : 'std::ofstream' does not define this
operator or a conversion to a type acceptable to the predefined operator
1>filepath(139): error C2228: left of '.Quantity' must have class/struct/union
1>filepath(145): error C2676: binary '[' : 'std::ofstream' does not define this
operator or a conversion to a type acceptable to the predefined operator
1>filepath(148): error C2676: binary '[' : 'std::ofstream' does not define this
operator or a conversion to a type acceptable to the predefined operator
1>filepath(148): error C2228: left of '.Quantity' must have class/struct/union
1>filepath(149): error C2676: binary '[' : 'std::ofstream' does not define this
operator or a conversion to a type acceptable to the predefined operator
1>filepath(149): error C2228: left of '.Quantity' must have class/struct/union
1>filepath(160): error C2143: syntax error : missing ';' before '{'
1>filepath(166): error C2046: illegal case
1>filepath(175): error C2143: syntax error : missing ';' before 'do'
1>filepath(179): error C2146: syntax error : missing ';' before identifier
'binarySearch'
1>filepath(179): error C3861: 'binarySearch': identifier not found
1>filepath(182): error C2143: syntax error : missing ';' before '{'
1>filepath(188): error C2046: illegal case
1> c:program files (x86)microsoft visual studio
12.0vcincludestring(135) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludestring(135) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludestring(135) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludestring(135) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludestring(135) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludestring(21) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludestring(21) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludestring(21) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludestring(21) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludestring(21) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludeistream(1103) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludeistream(1103) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludeistream(1103) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludeistream(1103) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludeistream(1103) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludeistream(1093) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludeistream(1093) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludeistream(1093) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludeistream(1093) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludeistream(1093) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludeistream(1086) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludeistream(1086) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludeistream(1086) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludeistream(1086) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludeistream(1086) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludeistream(1079) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludeistream(1079) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludeistream(1079) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludeistream(1079) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludeistream(1079) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludeistream(1072) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludeistream(1072) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludeistream(1072) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludeistream(1072) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludeistream(1072) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludeistream(1047) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludeistream(1047) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludeistream(1047) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludeistream(1047) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludeistream(1047) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludeistream(1006) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludeistream(1006) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludeistream(1006) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludeistream(1006) : see declaration of 'std::operator >>'
1> c:program files (x86)microsoft visual studio
12.0vcincludeistream(1006) : see declaration of 'std::operator >>'
1>filepath(198): error C2047: illegal default
1>filepath(203): error C2059: syntax error : ';'
1>filepath(205): error C2059: syntax error : 'while'
1>filepath(208): error C2447: '{' : missing function header (old-style formal
list?)
1>filepath(216): error C4430: missing type specifier - int assumed. Note: C++
does not support default-int
1>filepath(216): error C2365: 'system' : redefinition; previous definition was
'function'
1> c:program files (x86)microsoft visual studio
12.0vcincludestdlib.h(560) : see declaration of 'system'
1>filepath(216): error C2440: 'initializing' : cannot convert from 'const char
[6]' to 'int'
1> There is no context in which this conversion is possible
1>filepath(217): error C2059: syntax error : 'return'
1>filepath(218): error C2059: syntax error : '}'
1>filepath(218): error C2143: syntax error : missing ';' before '}'
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
//This program is to keep track of book entries at a book store
#include <iostream>
#include <string>
#include <stdlib.h>
#include <fstream>
using namespace std;
int main()
{
string NAME;
char var;
string booklist[100];
string output;
var = '1'; //These are the usuable variables
var = '2';
var = '3';
var = '4';
var = '5';
var = '6';
cout << "What is your name?" << endl; //This wasn't necessary but I felt that asking for your name made it more friendly.
getline(cin, NAME, 'n');
cout << "Welcome " << NAME << ", I hope this program greately benefits you! n" << endl;
struct bookList //Structure for all arrays
{
int ISBN; //Book ISBN number
string Author; //Book Author
string Title; //Book Title
int Quantity; //Book Quantity
double Price; //Book Price
};
// do loop execution
do
{
cout << "Please select an operation: n n n";
cout << "1: Read inventory from file n n";
cout << "2: Add an entry n n";
cout << "3: Delete an entry n n";
cout << "4: Update an entry n n";
cout << "5: Sort inventory n n";
cout << "6: Write inventory to file and exit n n";
cin >> var;
switch (var)
{
case 1:
{ //Case 1 will read the inventory from inventory.dat
ofstream bookList;
bookList.open("inventory.dat");
void printArray();
cout << endl;
bookList.close();
}
break;
case 2:
{ //Case 2 asks for infomation from the user to store into the array. It then sorts the information and also checks if the array is full.
int i;
int ISBN;
string Author;
string Title;
int Quantity;
double Price;
double MAX_SIZE = 100;
ofstream bookList;
do (int i = 0; i < MAX_SIZE; i++)
{
cout << "Here you can add a book to the database.nn" << endl;
cout << "Please enter the ISBN number.n" endl;
cin >> bookList[i].ISBN << endl;
cout << "Please enter the name of the Authorn";
cin >> bookList[i].Author << endl;
cout << "Please enter the name of the titlen";
cin >> bookList[i].Title << endl;
cout << "Please enter the Quantityn";
cin >> bookList[i].Quantity << endl;
cout << "Please enter the Price of the bookn";
cin >> bookList[i].Price << endl;
while (i > !MAX_SIZE)
{
cout << "Error: There is no more room to add entries. You will now be returned to the main menu." << endl;
}
};
return 0;
}
break;
case 3:
{ //3 deletes an entry by moving the other entries below the selected one and then decreases the array size by one.
int number;
cout << "You are about to delete an entry.nn" << "Please enter the number of the entry you'd like to remove.n";
cin >> number;
delete[number];
number = nullptr;
}
break;
case 4:
{ //4 is updating the quantitiy of an entry in the array.
int i;
char var;
int ISBN;
string Author;
string Title;
int Quantity;
double Price;
ofstream bookList;
var = 0;
var = 1;
var = 2;
var = 3;
cout << "Here you can update the Quantity of a book that you have stored in the database.nn" << "Please enter the ISBN number of the entry you'd like to update.n";
cin >> i;
cout << "Would you like to increase, decrease, or type the Quantity?nn" << "Type :n" << " 1 to increase the value by one.n";
cout << " 2 to decrease the value by one.n" << " 3 to enter a new value.n" << " 0 to return to the main menun";
cin >> var;
do
{
switch (var)
{
case 1:
{ //1 will increase the value by one.
if (bookList[i].ISBN == i)
{
bookList[i].Quantity++ << endl;
}
}
break;
case 2:
{ //2 will decrease the value by one.
if (bookList[ISBN] == i)
{
bookList[i].Quantity-- << endl;
}
}
break;
case 3:
{ //3 will allow you to enter an entirely new number.
if (bookList[ISBN] == i)
{
cout << "You currently have " << Quantity << " .n" << "Please enter the updated Quantityn";
cin >> bookList[i].Quantity << endl;
cout << "Your new Quantity is " << bookList[i].Quantity << ".n" << endl;
}
}
break;
default:
{
cout << "Please enter a number between 1 and 3.n";
}
break;
}
} while (var != 0)
{
return 0;
}
}
break;
case 5:
{ //Case 5 is to just sort the array by title
int ISBN;
string Author;
string Title;
int Quantity;
double Price;
int input
do
{
cout << "To search by title, press 1.n";
cin >> input
binarySearch(Title);
cout << "The database is now sorted by title.";
} while (input != 0)
{
return 0;
}
}
break;
case 6:
{ //Case 6 outputs text and exits the program.
ofstream bookList;
bookList.open("inventory.dat");
bookList >> output;
cout << output;
bookList.close();
exit(0);
}
break;
default:
{
cout << "Please enter a number between 1 and 6.n";
}
break;
};
} while (var != 6);
void printArray(int arr[], int size);
{
for (int i = 0; i < MAX_SIZE; i++)
{
cout << bookList[i] << ' ';
}
cout << endl;
}
system("pause");
return 0;}
这里有一些免费代码可以让你开始：
book.hpp:
class Book
{
public:
// empty or default constructor.
Book()
{ }
// A constructor
Book(const std::string& new_title,
const std::string& new_author,
const std::string& new_isbn,
double new_price)
: Title(new_title),
Author(new_author),
ISBN(new_isbn),
Price(new_price)
{ }
void input_from_user(void);
friend std::ostream& operator<<(std::ostream& out, const Book& b);
private:
string ISBN; //Book ISBN number
string Author; //Book Author
string Title; //Book Title
double Price; //Book Price
};
book.cpp:
ostream& operator<<(ostream& out, const Book& b)
{
out << b.Title << ","
<< b.Author << ","
<< b.ISBN << ","
<< b.Price << "n";
}
void
Book ::
input_from_user(void)
{
cout << "Enter book title:n";
getline(cin, Title);
cout << "Enter book author:n";
getline(cin, Author);
cout << "Enter ISBN:n";
getline(cin, ISBN);
cout << "Enter price: ";
cin >> Price;
}
main.cpp：
#include "book.hpp"
int main(void)
{
Book b;
b.input_from_user();
cout << "nThe book data, in CSV format:n";
cout << b;
return EXIT_SUCCESS;
}
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