more useful functionality

src/Ausgabenverwaltung.cpp

@@ -1,4 +1,4 @@
-#include <iostream>
+#include <iostream>
 #include <list>
 #include <string>
 
@@ -26,7 +26,7 @@ private:
 	category category_ = None;
 public:
 	Invoice(int number, double amount, unsigned short month, category category) : number_(number), amount_(amount),
-		month_(month), category_(category)
+	                                                                              month_(month), category_(category)
 	{
 	}
 
@@ -34,6 +34,38 @@ public:
 	{
 		return number_;
 	}
+
+	unsigned short get_month() const
+	{
+		return month_;
+	}
+
+	category get_category() const
+	{
+		return category_;
+	}
+
+	void print() const
+	{
+		cout << "Rechnung: " << number_ << endl;
+		cout << "Betrag: " << amount_ << endl;
+		cout << "Monat: " << month_ << endl;
+		cout << "Kategorie: " << category_ << endl;
+	}
+
+		/**
+	 * \brief Implements the equality operator.
+	 */
+	bool operator ==(const Invoice& e) const
+	{
+		return number_ == e.number_;
+	}
+
+	/**
+	 * \brief Implements the inequality operator.
+	 */
+	bool operator !=(const Invoice& e) const { return !operator==(e); }
+
 };
 
 template <typename T>
@@ -50,9 +82,19 @@ list<Invoice> invoices;
 
 void create_invoice();
 
-void output_invoice_per_month();
+void output_invoices(list<Invoice> sorted_invoices);
 
-void output_invoice_per_category();
+void delete_invoice();
+
+bool compare_category_ascending(const Invoice& first, const Invoice& second)
+{
+	return first.get_category() < second.get_category();
+}
+
+bool compare_month_ascending(const Invoice& first, const Invoice& second)
+{
+	return first.get_month() < second.get_month();
+}
 
 int main()
 {
@@ -66,8 +108,9 @@ int main()
 		cout << "2: Alle Ausgaben, sortiert nach Monat, ausgeben" << endl;
 		cout << "3: Summe der Ausgaben pro Kategorie ausgeben" << endl;
 		cout << "4: Rechnung l\x94schen" << endl;
+		cout << endl;
 		cout << "0: Programm beenden" << endl;
-		auto input = ask_question<int>("Ihre Eingabe:");
+		const auto input = ask_question<int>("Ihre Eingabe:");
 
 		switch (input)
 		{
@@ -75,10 +118,21 @@ int main()
 			create_invoice();
 			break;
 		case 2:
-			output_invoice_per_month();
+			{
+				auto temp = list<Invoice>(invoices);
+				temp.sort(compare_month_ascending);
+				output_invoices(temp);
+			}
 			break;
 		case 3:
-			output_invoice_per_category();
+			{
+				auto temp = list<Invoice>(invoices);
+				temp.sort(compare_category_ascending);
+				output_invoices(temp);
+			}
+			break;
+		case 4:
+			delete_invoice();
 			break;
 		case 0:
 			end_program = true;
@@ -96,20 +150,38 @@ category get_category();
 void create_invoice()
 {
 	cout << "Eine neue Rechnung erstellen." << endl << endl;
-	auto invoice_no = invoices.empty() ? 1 : invoices.back().get_number() + 1;
-	auto amount = ask_question<double>("Bitte geben Sie den Betrag in Euro ein.");
-	auto month = ask_question<unsigned short>("Bitte geben Sie den Monat ein.");
+	const auto invoice_no = invoices.empty() ? 1 : invoices.back().get_number() + 1;
+	const auto amount = ask_question<double>("Bitte geben Sie den Betrag in Euro ein.");
+	const auto month = ask_question<unsigned short>("Bitte geben Sie den Monat ein.");
 	const auto category = get_category();
 	const auto i = Invoice(invoice_no, amount, month, category);
 	invoices.push_back(i);
 }
 
-void output_invoice_per_month()
+
+void output_invoices(const list<Invoice> sorted_invoices)
 {
+	for (auto invoice : sorted_invoices)
+	{
+		invoice.print();
+		cout << "--------------" << endl;
+	}
+	system("pause");
 }
 
-void output_invoice_per_category()
+void delete_invoice()
 {
+	auto invoice_number = ask_question<int>("Bitte geben Sie die Rechnungsnummer ein");
+	for (auto invoice : invoices)
+	{
+		if(invoice.get_number() == invoice_number)
+		{
+			invoices.remove(invoice);
+			return;
+		}
+	}
+	cout << "Rechnung nicht gefunden." << endl;
+	system("pause");
 }
 
 category get_category()
@@ -130,6 +202,6 @@ category get_category()
 		{
 			return static_cast<category>(cat);
 		}
-		cout << "Ung\x81ltige Eingabe";
+		cout << "Ung\x81ltige Eingabe" << endl << endl;
 	}
 }