From ce654711db90ee4121f3df12e373f2362f9674ad Mon Sep 17 00:00:00 2001
From: Angel Dimitriev <achi_d@abv.bg>
Date: Tue, 15 Mar 2022 19:26:57 +0200
Subject: Add files via upload

---
 Sem. 03/array_of_students_read.cpp  | 56 +++++++++++++++++++++++++++++++++++++
 Sem. 03/array_of_students_write.cpp | 38 +++++++++++++++++++++++++
 2 files changed, 94 insertions(+)
 create mode 100644 Sem. 03/array_of_students_read.cpp
 create mode 100644 Sem. 03/array_of_students_write.cpp

diff --git a/Sem. 03/array_of_students_read.cpp b/Sem. 03/array_of_students_read.cpp
new file mode 100644
index 0000000..ab1f425
--- /dev/null
+++ b/Sem. 03/array_of_students_read.cpp	
@@ -0,0 +1,56 @@
+#include <iostream>
+#include <fstream>
+#include <cstring>
+using namespace std;
+
+struct Student
+{
+	char name[30];
+	int age;
+	int fn;
+};
+
+void initStudent(Student& st, const char* name, int age, int fn)
+{
+	strcpy(st.name, name);
+	st.age = age;
+	st.fn = fn;
+}
+
+void saveToFile(const Student* students, size_t count, ofstream& file)
+{
+	file.write((const char*)students, count * sizeof(Student));
+}
+
+
+size_t getFileSize(ifstream& f)
+{
+	size_t currentPos = f.tellg();
+	f.seekg(0, ios::end);
+	size_t size = f.tellg();
+	
+	f.seekg(currentPos);
+	return size;
+}
+
+void readFromFile(Student*& ptr, size_t& studentsCount, ifstream& f)
+{
+	size_t sizeOfFile = getFileSize(f);
+	studentsCount = sizeOfFile / sizeof(Student);
+	ptr = new Student[studentsCount];
+	f.read((char*)ptr, sizeOfFile);
+}
+
+
+int main()
+{
+	Student* arr;
+	size_t count;
+	ifstream file("students.dat");
+	readFromFile(arr, count, file);
+
+	for (int i = 0; i < count; i++)
+		std::cout << "Name: " << arr[i].name << ", age: " << arr[i].age << ", fn: " << arr[i].fn << std::endl;
+	
+	delete[] arr;
+}
\ No newline at end of file
diff --git a/Sem. 03/array_of_students_write.cpp b/Sem. 03/array_of_students_write.cpp
new file mode 100644
index 0000000..3802bf8
--- /dev/null
+++ b/Sem. 03/array_of_students_write.cpp	
@@ -0,0 +1,38 @@
+#include <iostream>
+#include <fstream>
+#include <cstring>
+using namespace std;
+
+struct Student
+{
+	char name[30];
+	int age;
+	int fn;
+};
+
+void initStudent(Student& st, const char* name, int age, int fn)
+{
+	strcpy(st.name, name);
+	st.age = age;
+	st.fn = fn;
+}
+
+void saveToFile(const Student* students, size_t count, ofstream& file)
+{
+	file.write((const char*)students, count * sizeof(Student));
+}
+
+
+int main()
+{
+	Student* arr = new Student[4];
+	initStudent(arr[0], "ivan", 44, 1234);
+	initStudent(arr[1], "petur", 12, 765);
+	initStudent(arr[2], "alex", 15, 44);
+	initStudent(arr[3], "katerina", 19, 12134);
+
+	ofstream file("students.dat", ios::binary);
+	saveToFile(arr, 4, file);
+	
+	delete[] arr;
+}
\ No newline at end of file
-- 
cgit v1.3.1-23-gd82d