getCalc1 = throwCalc1();void read_books(string book_file_name, vector<book> &my_books)
{
string name, price, stock, publisher, author, isbn;
book *bookpt;
ifstream fin;
string bookFile = "books.txt";
fin.open(bookFile);
while(fin >> name >> price >> stock >> publisher >> author >> isbn)
{
bookpt = new book;
bookpt -> setName(name);
bookpt -> setPrice(price);
bookpt -> setStock(stock);
bookpt -> setPublisher(publisher);
bookpt -> setAuthor(author);
bookpt -> setIsbn(isbn);
my_books.push_back(*bookpt);
}
fin.close();
}Code:
for(int i = 0; i < all_books.size(); i++)
{
my_books[i].print_info();
}
Output:
Product Name: Book
Product Price: Price
Number in Stock: Stock
Publisher: Publisher
Author: Author
ISBN: ISBNvoid write_books(string book_file_name, vector<book> &my_books)
{
ofstream fout;
book_file_name = "final_books.txt";
fout.open(book_file_name);
for(int i = 0; i < my_books.size(); i++)
{
fout << my_books[i] << endl;
}
fout.close();
} fout << my_books[i] << endl;The "book" struct or class is not standard C++, so naturally there's no suitable << operator defined for sticking it into an output stream. If you want to be able to write that line of code, define the operator yourself:
Odd. I've mostly heard good things about it from C# developers.
NuGet is fantastic. This is a weird post. Check your internet connection. Downloading things just works. Also, if you're checking the dlls into your code repository, that has nothing to do with nuget. You're just doing that. And if the people building your code don't have the dependency, again that's nothing to do with nuget.
I'm ignorant about web dev, but this clearly makes sense for a newbie as well as the cool kids. You absolutely must know Javascript for web dev, because anything that happens on browser side uses it. For a programming newbie it helps a lot to stick to one language and get good at it before messing with others. Ergo, it makes sense to use JS on the server too.
Most programming tutorials out there are bad, and I'm willing to bet that Javascript tutorials are even worse on average. Someone new to programming should *start* from a good book. The first version of the book you recommended, Eloquent Javascript, is free. If you open the "interactive" version, it even has a small custom Javascript console on the bottom that you can use to test the examples.
public static void TryFinally()
{
int random = new Random().Next(0, 3);
try
{
if (random == 2)
Console.WriteLine("It's 2!");
else
{
throw new Exception("Not 2!");
}
}
catch (Exception g)
{
Console.WriteLine(g.Message);
}
finally
{
Console.WriteLine("Finally!");
}
Console.ReadLine();
} public static void TryFinally()
{
int random = new Random().Next(0, 3);
try
{
if (random == 2)
Console.WriteLine("It's 2!");
else
{
throw new Exception("Not 2!");
}
}
catch (Exception g)
{
Console.WriteLine(g.Message);
}
Console.WriteLine("Finally!");
Console.ReadLine();
} public static void LetsTryFinallyAgain()
{
int x = 2;
int[] y = new int[1];
try
{
Console.WriteLine("Phase one");
while (x == 1)
{
Console.WriteLine("Phase two");
break;
}
if (x == 3)
Console.WriteLine("Phase three");
for (int i = 0; i < 2; i++)
{
y[i] = 5;
}
Console.WriteLine("Phase four");
}
finally
{
Console.WriteLine("Phase five");
}
Console.ReadLine();
}What language are you talking about?
In C++ use of protected and friend should be rare. It's useful on occasion, but beginners will use them both wrong 9 times out of 10.
Friends can access public, protected and private data. This makes it much harder to reason about the state of a class that has friends; a lot of code can muck with the internal state of the class.
I don't think this is particular to C#.
#include "student.h"
#include "ui_student.h"
#include <QMessageBox>
#include "studentbl.h"
Student::Student(QWidget *parent) :
QDialog(parent),
ui(new Ui::Student)
{
ui->setupUi(this);
}
Student::~Student()
{
delete ui;
}
/**
* @brief Student::on_addNewStudentPushButton_clicked
*/
void Student::on_addNewStudentPushButton_clicked()
{
StudentBL myStudent(ui->firstNameLineEdit->text(),
ui->lastNameLineEdit->text(),
ui->usernameLineEdit->text(),
ui->passwordLineEdit->text());
[B] ui->statusLabel->setText(myStudent.add());[/B]
}You're not testing it without debugging. Test it on a release, and you will see that the code after the finally will not be run after an exception that is not caught, whereas the finally block will be (not in ALL cases though).
try
{
throw new StackOverflowException();
}
catch(InvalidOperationException ex)
{
Console.WriteLine("Caught");
}
finally
{
Console.WriteLine("Reached Finally");
}
Console.WriteLine("Reached after trycatch");Debug > Start without debugging.
The point of try/finally is that the finally block will be executed even if an exception occurs in the try block. Without using try/finally, the exception would cause the stack to unwind (ie: no more code in that function will be executed. essentially it aborts).
var file = new FileInfo(@"C:\temp\whatever.txt");
var text = "some text";
var bytes = Encoding.ASCII.GetBytes(text);
FileStream fstream = null;
try
{
fstream = file.OpenWrite();
fstream.Write(bytes, 0, bytes.Length);
}
finally
{
if(fstream != null)
{
fstream.Close();
}
}public void Alpha()
{
Console.WriteLine("one");
throw new DivideByZeroException();
Console.WriteLine("two");
}
public void Beta()
{
try
{
Console.WriteLine("one");
throw new DivideByZeroException();
}
finally
{
Console.WriteLine("two");
}
}
int main(){
LinkedList list;
cout << list.firstName << endl; //I know this is wrong
return 0;
}#include "Node.h"
class LinkedList{
public:
LinkedList();
void printList();
void insert(Student&);
void extract(unsigned int);
private:
Node* head;
int size;
};#ifndef NODE_H_
#define NODE_H_
#include <iostream>
#include <string>
#include "Student.h"
class Node{
friend std::ostream& operator<<(std::ostream& os, const Node&);
friend class LinkedList;
public:
Node(std::string name = "none");
Node(Student);
private:
double mark;
unsigned int age;
unsigned int id;
unsigned int courseCount;
string firstName;
string lastName;
double average;
std::string name; //Name of Node
Node* next; //Points to next thing in the linked list.
};public void p(double i)public void p(int i)Since I learned Ruby first, it's always been more to my liking.
づvoid printList() {
if(this->head == NULL) {
std::cout << "Empty list" << std::endl;
return;
}
Node *it = this->head;
while(it->next != NULL) {
std::cout << it->value << " -> "; // Replace this with whatever you want to print about this node
it = it->next;
}
std::cout << it->value << std::endl; // To get the last node
return;
} select accounttid, creationdate, personid from Table1 where personid in (
select (personid) from Table1 group by personid having COUNT (accountid) > 1)
accountid creationdate personid
5501624 2013-05-01 101
5501544 2013-05-03 101
5510220 2013-10-24 10337
5504204 2013-06-27 10337
5502332 2013-05-21 1047
5502628 2013-05-28 1047
5508844 2013-10-01 1047