From 0d9276b3ef084ef8504b32c4d8832be74b514018 Mon Sep 17 00:00:00 2001
From: Angeld55 <achi_d@abv.bg>
Date: Wed, 20 Mar 2019 12:38:39 +0200
Subject: Add files via upload

---
 BinaryFiles/GetStructsFromBinaryFile.cpp          |  47 ++++++++++++++++++++++
 BinaryFiles/SaveStructsToBinaryFile(as array).cpp |  37 +++++++++++++++++
 BinaryFiles/SaveStructsToBinaryFile.cpp           |  40 ++++++++++++++++++
 BinaryFiles/Structs.bat                           | Bin 0 -> 24 bytes
 BinaryFiles/StructsBAT (how does it look).png     | Bin 0 -> 6050 bytes
 5 files changed, 124 insertions(+)
 create mode 100644 BinaryFiles/GetStructsFromBinaryFile.cpp
 create mode 100644 BinaryFiles/SaveStructsToBinaryFile(as array).cpp
 create mode 100644 BinaryFiles/SaveStructsToBinaryFile.cpp
 create mode 100644 BinaryFiles/Structs.bat
 create mode 100644 BinaryFiles/StructsBAT (how does it look).png

(limited to 'BinaryFiles')

diff --git a/BinaryFiles/GetStructsFromBinaryFile.cpp b/BinaryFiles/GetStructsFromBinaryFile.cpp
new file mode 100644
index 0000000..2d91189
--- /dev/null
+++ b/BinaryFiles/GetStructsFromBinaryFile.cpp
@@ -0,0 +1,47 @@
+#include <iostream>
+#include <fstream>
+using namespace std;
+
+struct test
+{
+	char ch;
+	int num;
+};
+
+int GetFileSize(ifstream& ifs)
+{
+	ifs.seekg(0, std::ios::end); //отиваме в края на файла
+	int size = ifs.tellg(); //запазваме коя е текущата позиция(тя всъщност е и размерът на файла)
+	ifs.seekg(0, std::ios::beg); //връщаме се в началото на файла  
+	return size;
+//тази функция е хубаво да я извикваме преди да сме чели каквото и да е от файла, понеже ще се върнем в началото и ще загубим информация до къде сме стигнали с четенето
+}
+
+ 
+int main()
+{
+	std::ifstream inF("Structs.bat", std::ios::binary);
+
+	if (!inF.is_open())
+		return false;
+
+	int fileSize = GetFileSize(inF); // взимаме големината на файла
+	int objectCount = fileSize / sizeof(test); // намираме броя на обектите записани във файла
+
+	test* arr = new test[objectCount];
+
+	inF.read((char*)arr, fileSize); //директно ги четем в масива
+
+	if (!inF)
+	{
+		cout << "Error occurred while reading from the file";
+		return 1;
+	}
+	inF.close();
+
+	for (int i = 0; i < objectCount; i++)
+		cout << arr[i].ch << " " << arr[i].num << endl;
+	delete[] arr;
+
+	return 0;
+}
\ No newline at end of file
diff --git a/BinaryFiles/SaveStructsToBinaryFile(as array).cpp b/BinaryFiles/SaveStructsToBinaryFile(as array).cpp
new file mode 100644
index 0000000..b8d5cfe
--- /dev/null
+++ b/BinaryFiles/SaveStructsToBinaryFile(as array).cpp	
@@ -0,0 +1,37 @@
+#include <iostream>
+#include <fstream>
+using namespace std;
+
+struct test
+{
+	char ch;
+	int num;
+};
+
+int main()
+{
+
+	test arr[] = { { 'a', 4 }, { 'b', 5 }, { 'c', 6 } };
+
+	ofstream outF("Structs.bat", ios::binary);
+
+	if (!outF.is_open())
+	{
+		cout << "Error while opening file" << endl;
+		return 1;
+	}
+
+	outF.write((const char*)&arr, sizeof(arr)); 
+	//можем директно да запазим масива във файла. Резултатът ще същия като от SaveStructToBinaryFile.cpp
+	
+
+	if (!outF.good()) 
+	{
+		cout << "Error occurred while writing the file";
+		return 1;
+	}
+
+	outF.close();
+
+	return 0;
+}
\ No newline at end of file
diff --git a/BinaryFiles/SaveStructsToBinaryFile.cpp b/BinaryFiles/SaveStructsToBinaryFile.cpp
new file mode 100644
index 0000000..5e03b44
--- /dev/null
+++ b/BinaryFiles/SaveStructsToBinaryFile.cpp
@@ -0,0 +1,40 @@
+#include <iostream>
+#include <fstream>
+using namespace std;
+
+struct test
+{
+	char ch;
+	int num;
+};
+
+int main()
+{
+
+	test obj1{ 'a', 4 };
+	test obj2{ 'b', 5 };
+	test obj3{ 'c', 6 };
+
+	ofstream outF("Structs.bat", ios::binary);
+
+	if (!outF.is_open())
+	{
+		cout << "Error while opening file"<<endl;
+		return 1;
+	}
+	
+	//запазваме 3-те обекта във файла
+	outF.write((const char*)&obj1, sizeof(test));
+	outF.write((const char*)&obj2, sizeof(test));
+	outF.write((const char*)&obj3, sizeof(test));
+
+	if (!outF.good()) // проверяваме дали след операцията потокът е в невалидено състояние
+	{
+		cout<<"Error occurred while writing the file";
+		return 1;
+	}
+	
+	outF.close();
+
+	return 0;
+}
\ No newline at end of file
diff --git a/BinaryFiles/Structs.bat b/BinaryFiles/Structs.bat
new file mode 100644
index 0000000..37573c8
Binary files /dev/null and b/BinaryFiles/Structs.bat differ
diff --git a/BinaryFiles/StructsBAT (how does it look).png b/BinaryFiles/StructsBAT (how does it look).png
new file mode 100644
index 0000000..5e9e5b3
Binary files /dev/null and b/BinaryFiles/StructsBAT (how does it look).png differ
-- 
cgit v1.3.1-23-gd82d