added new examples

1 files changed, 91 insertions, 0 deletions

diff --git a/Big4_and_inheritance/Students/GradesBook.cpp b/Big4_and_inheritance/Students/GradesBook.cpp
new file mode 100644
index 0000000..6d3de27
--- /dev/null
+++ b/Big4_and_inheritance/Students/GradesBook.cpp
@@ -0,0 +1,91 @@
+#include "GradesBook.h"
+
+
+GradesBook::GradesBook()
+{
+	capacity = 4;
+	grades = new int[capacity];
+	size = 0;
+}
+GradesBook::GradesBook(const GradesBook& other)
+{
+	std::cout << "Copy contr of GradesBook" << std::endl;
+	CopyFrom(other);
+}
+GradesBook& GradesBook::operator=(const GradesBook& other)
+{
+	if (this != &other)
+	{
+		Free();
+		CopyFrom(other);
+	}
+	return *this;
+}
+GradesBook::~GradesBook()
+{
+	Free();
+}
+
+
+void GradesBook::CopyFrom(const GradesBook& other)
+{
+	grades = new int[other.capacity];
+	for (int i = 0; i < other.size; i++)
+		grades[i] = other.grades[i];
+	capacity = other.capacity;
+	size = other.size;
+}
+void GradesBook::Free()
+{
+	delete[] grades;
+}
+
+
+bool GradesBook::isFull()
+{
+	return size == capacity;
+}
+void GradesBook::AddGrade(int grade)
+{
+	if (!isValidGrade(grade))
+		return;
+	if (isFull())
+		Resize();
+	grades[size++] = grade;
+
+}
+void GradesBook::Resize()
+{
+	int* temp = new int[capacity * 2];
+	for (int i = 0; i < size; i++)
+		temp[i] = grades[i];
+	capacity *= 2;
+	delete[] grades;
+	grades = temp;
+}
+void GradesBook::RemoveLastGrade()
+{
+	size--;
+}
+bool GradesBook::isValidGrade(int grade)
+{
+	return (grade >= 2 && grade <= 6);
+}
+int GradesBook::operator[](int index) const
+{
+	if (index < 0 || index >= size)
+		return -1;
+	return grades[index];
+}
+
+std::ostream& operator<<(std::ostream& stream, GradesBook& obj)
+{
+	for (int i = 0; i < obj.capacity; i++)
+	{
+		if (i < obj.size)
+			stream << obj.grades[i] << ' ';
+		else
+			stream << '_' << ' ';
+	}
+	return stream;
+}
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