From 5323ea8eeb528fbd716e1f1c61187bc8668f86b2 Mon Sep 17 00:00:00 2001
From: Angel Dimitriev <achi_d@abv.bg>
Date: Sun, 3 Apr 2022 14:47:54 +0300
Subject: Add files via upload

---
 k_1_SI/task2_write.cpp | 83 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 83 insertions(+)
 create mode 100644 k_1_SI/task2_write.cpp

(limited to 'k_1_SI/task2_write.cpp')

diff --git a/k_1_SI/task2_write.cpp b/k_1_SI/task2_write.cpp
new file mode 100644
index 0000000..a5ae67e
--- /dev/null
+++ b/k_1_SI/task2_write.cpp
@@ -0,0 +1,83 @@
+#include <iostream>
+#include <fstream>
+#include <cstring>
+using namespace std;
+
+const size_t MAX_NAME_SIZE = 22;
+struct Student
+{
+	char name[MAX_NAME_SIZE + 1];
+   	bool isMale;
+	size_t fn;
+};
+
+bool isLower(char ch)
+{
+	return ch >= 'a' && ch <= 'z';
+}
+
+bool areAllLowerCase(const char* str)
+{
+	while(*str)
+	{
+		if(!isLower(*str))
+			return false;
+		str++;
+	}
+	return true;
+}
+
+bool isUpper(char ch)
+{
+	return ch >= 'A' && ch <= 'Z';
+}
+
+bool isNameValid(const char* name)
+{
+	size_t len = strlen(name);
+	if(len == 0 || len > MAX_NAME_SIZE)
+		return false;
+	return isUpper(*name) && areAllLowerCase(name + 1);
+}
+
+void initStudent(Student& st, const char* name, size_t fn, bool isMale)
+{
+    if(!isNameValid(name))
+        strcpy(st.name, "Unknown");
+    else
+        strcpy(st.name, name);
+
+    st.isMale = isMale; 
+    st.fn = fn;
+}
+
+void saveToFile(const Student* students, size_t count, ofstream& file)
+{
+	file.write((const char*)students, count * sizeof(Student));
+}
+
+
+int main()
+{
+    const size_t studentsCount = 4;
+	Student* arr = new Student[studentsCount];
+	initStudent(arr[0], "Ivan", 1, true);
+	initStudent(arr[1], "Petur", 2, true);
+	initStudent(arr[2], "Alex", 3, true);
+	initStudent(arr[3], "Katerina", 4, false);
+
+	ofstream file("students.dat", ios::binary);
+		
+	if(!file.is_open())
+	{
+		std::cout << "Error while opening the file!" << std::endl;
+		delete[] arr; //!
+		return -1;
+	}
+		
+	saveToFile(arr, studentsCount, file);
+	
+	delete[] arr;
+	
+	return 0;
+}
-- 
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