c++ - getline.. - Udvikleren.dk - Programmering, webdesign og grafik

Tags: c++

Bruger #14212 @ 02.10.09 17:46

Det virker ikke ved mig.. jeg ved ikke hvad fanden der er galt men her er min kode

productsFunction.cpp

Kode

void Products::newProduct(char* Filename)
{
	system("CLS");

	string again;
		string name;
				float price;
				string priceString;

	do
	{
	cout << "Enter the name of the new product: ";
	getline(cin, name);

	cout << endl << "Enter price of the new product: ";
	getline(cin, priceString);
	stringstream SS(priceString);
	SS >> price;


	ofstream writeProducts;
	writeProducts.open(Filename, ios::out | ios::app | ios::binary);
	if(writeProducts.is_open())
	{
		writeProducts << "Name: " << name << endl;
		writeProducts << "Price: " << price << endl;
		writeProducts.close();
	}
	

	cout << endl << "Add more products?" << endl << "Yes" << endl << "No" << endl;
	cin >> again;

	} while(again == "yes" || again == "Yes");
}

main.cpp

Kode

if(opportunity == 1)
			{
				cout << "Please enter file you wil write to. Normal file is Products.txt" << endl;
				cin >> file;
				products.newProduct(file);
			}

Det den gør er at i pro...functions er at den sprænger Enter name over..??

Bruger #10853 @ 02.10.09 19:09

Jeg kan ikke se nogen grund til at du åbner filen i binary mode.. Kan være derfor det går galt for dig

Bruger #4996 @ 02.10.09 19:37

196

Du bør også lave disse om til at bruge getline:
cin >> again;
cin >> file;

Det er generelt en dårlig ide at mixe << og getline, brug getline til alt.

Bruger #14212 @ 03.10.09 10:10

Den springer stadig over Enter name..?
Hvad gør jeg forkert

main.cpp

Kode

char file[80];
			int opportunity;

			system("CLS");
			cout << "You are now logged in as admin!" << endl;
			cout << "You have 3 opportunities." << endl << "1) New product" << endl << "2) Browse products" << endl << "3) Search for a product" << endl;
			cout << "Please enter the number on which opportunity you want: ";
			cin >> opportunity;

			if(opportunity == 1)
			{
				cout << "Please enter file you wil write to. Normal file is Products.txt" << endl;
				cin >> file;
				products.newProduct(file);
			}
			else if(opportunity == 2)
			{
				cout << "Please enter file you will browse from. Normal file is Products.txt" << endl;
				cin >> file;
				products.browseProducts(file);
			}

productFunctions.cpp

Kode

void Products::newProduct(char* Filename)
{
	system("CLS");

	string again;
		string productName;
				float price;
				string priceString;

	do
	{
	cout << "Enter the name of the new product: ";
	getline(cin, productName);

	cout << endl << "Enter price of the new product: ";
	getline(cin, priceString);
	stringstream SS(priceString);
	SS >> price;


	ofstream writeProducts;
	writeProducts.open(Filename, ios::out | ios::app);
	if(writeProducts.is_open())
	{
		writeProducts << "Name: " << productName << endl;
		writeProducts << "Price: " << price << endl;
		writeProducts.close();
	}
	

	cout << endl << "Add more products?" << endl << "Yes" << endl << "No" << endl;
	getline(cin, again);

	} while(again == "yes" || again == "Yes");
}

products.h

Kode

#include "includer.h"

class Products {
public:
	Products() {};

	// Nyt produkt som skal skrives ind i vector
	void newProduct(char* Filename);

	// Mulighed for at søge vectoren igennem
	int searchProduct(char* Filename);

	void browseProducts(char* Filename);
};

Bruger #4996 @ 03.10.09 11:51

196

Vi tager den lige en gang til:

Der hvor du læser again skal du lave det om til:
getline(cin, again);

Og der hvor du beder om file skal du lave det om til:
std::string file;
cout << "Please enter file you wil write to. Normal file is Products.txt" << endl;
getline(cin, file);
newProduct(file.c_str());

Det kræver så at du sætter const på her:
void Products::newProduct(const char* Filename)

Bruger #14212 @ 04.10.09 20:31

Vi tager den lige en gang til:

Der hvor du læser again skal du lave det om til:
getline(cin, again);

Og der hvor du beder om file skal du lave det om til:
std::string file;
cout << "Please enter file you wil write to. Normal file is Products.txt" << endl;
getline(cin, file);
newProduct(file.c_str());

Det kræver så at du sætter const på her:
void Products::newProduct(const char* Filename)

Nu hopper den Enter filename over..
Altså der hvor man skal skrive hvilken fil man gerne vil skrive til s:
koden er:

ProductsFunctions.cpp

Kode

void Products::newProduct(const char* Filename)
{
	system("CLS");

	string again;
		string productName;
				float price;
				string priceString;

	do
	{
	cout << "Enter the name of the new product: ";
	getline(cin, productName);

	cout << endl << "Enter price of the new product: ";
	getline(cin, priceString);
	stringstream SS(priceString);
	SS >> price;


	ofstream writeProducts;
	writeProducts.open(Filename, ios::out | ios::app);
	if(writeProducts.is_open())
	{
		writeProducts << "Name: " << productName << endl;
		writeProducts << "Price: " << price << endl;
		writeProducts.close();
	}
	

	cout << endl << "Add more products?" << endl << "Yes" << endl << "No" << endl;
	getline(cin, again);

	} while(again == "yes" || again == "Yes");
}

main.cpp

Kode

string file;
			int opportunity;

			system("CLS");
			cout << "You are now logged in as admin!" << endl;
			cout << "You have 3 opportunities." << endl << "1) New product" << endl << "2) Browse products" << endl << "3) Search for a product" << endl;
			cout << "Please enter the number on which opportunity you want: ";
			cin >> opportunity;

			if(opportunity == 1)
			{
				cout << "Please enter file you wil write to. Normal file is Products.txt" << endl;
				getline(cin, file);
				cin.get();
				products.newProduct(file.c_str());
			}

products.h

Kode

#include "includer.h"

class Products {
public:
	Products() {};

	// Nyt produkt som skal skrives ind i vector
	void newProduct(const char* Filename);

	// Mulighed for at søge vectoren igennem
	int searchProduct(char* Filename);

	void browseProducts(const char* Filename);
};

Bruger #4996 @ 04.10.09 20:37

196

Du bliver nok nødt til at lave denne om til en getline også:
cin >> opportunity;

Hent en std::string med getline, læs den over i en stringstream og brug >> på den.

Bruger #14212 @ 04.10.09 20:47

Du bliver nok nødt til at lave denne om til en getline også:
cin >> opportunity;

Hent en std::string med getline, læs den over i en stringstream og brug >> på den.

Altså:

Kode

string file;
			string oppo;
			int opportunity;

			system("CLS");
			cout << "You are now logged in as admin!" << endl;
			cout << "You have 3 opportunities." << endl << "1) New product" << endl << "2) Browse products" << endl << "3) Search for a product" << endl;
			cout << "Please enter the number on which opportunity you want: ";
			getline(cin, oppo);
			stringstream SS(oppo);
			SS >> opportunity;

			if(opportunity == 1)
			{
				cout << "Please enter file you wil write to. Normal file is Products.txt" << endl;
				getline(cin, file);
				products.newProduct(file.c_str());
			}

Bruger #4996 @ 05.10.09 00:00

196

Det ser rigtigt ud

Bruger #14212 @ 05.10.09 15:46

Det ser rigtigt ud

Det virker stadig ikke.. Nu når jeg ikke engang at skrive navnet på den fil jeg vil skrive til?

Hele main:

Kode

#include "includer.h"
#include "products.h"
#include "classes.h"


int main()
{
	cout << "Welcome to my store!" << endl;

	cout << "Please enter your name, or if administrator enter admin." << endl;

	//Vector
	vector<string> NewProduct;

	//Vores Ofstream og Istreams.
	ifstream readProducts("Products.txt");


	//Laver ny class
	Persons persons;

	//Laver ny structure
	Products products;

	//Pointer til classen Persons
	persons.name = new char[80];
	string Name = persons.name;

	getline(cin, Name);

	//Admin delen
	if(Name == "admin" || Name == "Admin")
	{
		cout << "Please enter password: ";
		string password;
		getline(cin, password);
		if(password == "admin")
		{
			const char *p;
			string file;
			string opportunity;

			system("CLS");
			cout << "You are now logged in as admin!" << endl;
			cout << "You have 3 opportunities." << endl << "1) New product" << endl << "2) Browse products" << endl << "3) Search for a product" << endl;
			cout << "Please enter the number on which opportunity you want: ";
			getline(cin, opportunity);
			p = opportunity.c_str();

			if(p == "1")
			{
				cout << "Please enter file you wil write to. Normal file is Products.txt" << endl;
				getline(cin, file);
				products.newProduct(file.c_str());
			}
			else if(p == "2")
			{
				cout << "Please enter file you will browse from. Normal file is Products.txt" << endl;
				getline(cin, file);
				products.browseProducts(file.c_str());
			}
		}
			
		// ADMINISTRATOR!
	}

	else
	{
		system("CLS");
		cout << "Welcome " << Name << endl;
	}
}

Hele productsFunctions.cpp

Kode

#include "products.h"
#include "includer.h"
#include <windows.h>
#include <iostream>
#include <fstream>
#include <vector>
#include <string>
#include <sstream>
#include <stdio.h>

using namespace std;


void Products::newProduct(const char* Filename)
{
	system("CLS");

	string again;
	string productName;
	float price;
	string priceString;

	do
	{
	cout << "Enter the name of the new product: ";
	getline(cin, productName);

	cout << endl << "Enter price of the new product: ";
	getline(cin, priceString);
	stringstream SS(priceString);
	SS >> price;


	ofstream writeProducts;
	writeProducts.open(Filename, ios::out | ios::app);
	if(writeProducts.is_open())
	{
		writeProducts << "Name: " << productName << endl;
		writeProducts << "Price: " << price << endl;
		writeProducts.close();
	}
	

	cout << endl << "Add more products?" << endl << "Yes" << endl << "No" << endl;
	getline(cin, again);

	} while(again == "yes" || again == "Yes");
}

void Products::browseProducts(const char* Filename)
{
	string results;

	system("CLS");
	cout << "Browsing Products.." << endl << endl;
	Sleep(3000);

	ifstream file;
	file.open(Filename, ios::in | ios::beg);
	if(file.is_open())
	{
		while(!file.eof())
		{
			getline(file, results);
		}
	}
}

og til sidst products.h

Kode

#include "includer.h"

class Products {
public:
	Products() {};

	// Nyt produkt som skal skrives ind i vector
	void newProduct(const char* Filename);

	// Mulighed for at søge vectoren igennem
	int searchProduct(char* Filename);

	void browseProducts(const char* Filename);
};

Jeg fatter det ik s:

Bruger #14212 @ 05.10.09 15:51

Det virker nu.

getline..

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