8 files changed, 173 insertions, 0 deletions
diff --git a/week10/Exercise10/ModifiableString.cpp b/week10/Exercise10/ModifiableString.cpp
new file mode 100644
index 0000000..bd42088
--- /dev/null
+++ b/week10/Exercise10/ModifiableString.cpp
@@ -0,0 +1,14 @@
+#include "ModifiableString.h"
+
+char& ModifiableString::operator[](int index) {
+	return str[index];
+}
+
+char& ModifiableString::operator[](int index) const {
+	return str[index];
+}
+
+ModifiableString& ModifiableString::operator+=(const ModifiableString& right) {
+	String::operator=(*this + right);
+	return *this;
+}
diff --git a/week10/Exercise10/ModifiableString.h b/week10/Exercise10/ModifiableString.h
new file mode 100644
index 0000000..971ceb8
--- /dev/null
+++ b/week10/Exercise10/ModifiableString.h
@@ -0,0 +1,9 @@
+#pragma once
+#include "String.h"
+
+class ModifiableString : protected String {
+public:
+	char& operator[](int index);
+	char& operator[](int index) const;
+	ModifiableString& operator+=(const ModifiableString& right);
+};
diff --git a/week10/Exercise10/SaveableString.cpp b/week10/Exercise10/SaveableString.cpp
new file mode 100644
index 0000000..4fa41e8
--- /dev/null
+++ b/week10/Exercise10/SaveableString.cpp
@@ -0,0 +1,32 @@
+#include "SaveableString.h"
+#include <cstring>
+#include <fstream>
+
+void SaveableString::write(const char* fileName) {
+	std::ofstream outFile(fileName);
+	if (!outFile.is_open()) {
+		throw "Coudln't open file!";
+	}
+
+	outFile.write(fileName, sizeof(char) * strlen(str));
+
+	outFile.close();
+}
+
+void SaveableString::read(const char* fileName) {
+	std::ifstream inFile(fileName);
+	if (!inFile.is_open()) {
+		throw "Coudln't open file!";
+	}
+
+	inFile.seekg(0, std::ios::end);
+	unsigned length = inFile.tellg();
+	inFile.seekg(0, std::ios::beg);
+
+	free();
+	str = new char[length + 1];
+	inFile.read(str, sizeof(char) * length);
+	str[length] = '\0';
+
+	inFile.close();
+}
diff --git a/week10/Exercise10/SaveableString.h b/week10/Exercise10/SaveableString.h
new file mode 100644
index 0000000..3952c27
--- /dev/null
+++ b/week10/Exercise10/SaveableString.h
@@ -0,0 +1,8 @@
+#pragma once
+#include "ModifiableString.h"
+
+class SaveableString : ModifiableString {
+public:
+	void write(const char* fileName);
+	void read(const char* fileName);
+};
diff --git a/week10/Exercise10/ShowableString.cpp b/week10/Exercise10/ShowableString.cpp
new file mode 100644
index 0000000..1231a9c
--- /dev/null
+++ b/week10/Exercise10/ShowableString.cpp
@@ -0,0 +1,9 @@
+#include "ShowableString.h"
+
+std::ostream& operator<<(std::ostream& ostr, const ShowableString& str) {
+	return ostr << str;
+}
+
+std::istream& operator>>(std::istream& istr, const ShowableString& str) {
+	return istr >> str; // Лошо!
+}
diff --git a/week10/Exercise10/ShowableString.h b/week10/Exercise10/ShowableString.h
new file mode 100644
index 0000000..ff46f6c
--- /dev/null
+++ b/week10/Exercise10/ShowableString.h
@@ -0,0 +1,9 @@
+#pragma once
+#include "ModifiableString.h"
+#include <iostream>
+
+class ShowableString : ModifiableString {
+public:
+	friend std::ostream& operator<<(std::ostream& ostr, const ShowableString& str);
+	friend std::istream& operator>>(std::istream& istr, const ShowableString& str);
+};
diff --git a/week10/Exercise10/String.cpp b/week10/Exercise10/String.cpp
new file mode 100644
index 0000000..7fd689f
--- /dev/null
+++ b/week10/Exercise10/String.cpp
@@ -0,0 +1,71 @@
+#include "String.h"
+#include <cstring>
+
+void String::free() {
+	delete[] str;
+}
+
+void String::copyFrom(const String& other) {
+	this->str = new char[strlen(other.str) + 1];
+	strcpy(this->str, other.str);
+}
+
+String::String() {
+	str = nullptr;
+}
+
+String::~String() {
+	free();
+}
+
+String::String(const String& other) {
+	copyFrom(other);
+}
+
+String& String::operator=(const String& other) {
+	if (this != &other) {
+		free();
+		copyFrom(other);
+	}
+	return *this;
+}
+
+String::String(String&& other) {
+	this->str = other.str;
+}
+
+String& String::operator=(String&& other) {
+	if (this != &other) {
+		free();
+
+		this->str = other.str;
+	}
+	return *this;
+}
+
+bool operator==(const String& left, const String& right) {
+	int i;
+	for (i = 0; left.str[i] != '\0' && right.str[i] != '\0'; i++) {
+		if (left.str[i] != right.str[i])
+			return false;
+	}
+	return left.str[i] == '\0' && right.str[i] == '\0';
+}
+
+bool operator!=(const String& left, const String& right) {
+	return !(left == right);
+}
+
+String operator+(const String& left, const String& right) {
+	String concat;
+	concat.str = new char[strlen(left.str) + strlen(right.str) + 1];
+	int i;
+	for (i = 0; left.str[i] != '\0'; i++) {
+		concat.str[i] = left.str[i];
+	}
+	int j;
+	for (j = 0; right.str[j] != '\0'; j++) {
+		concat.str[i+j] = right.str[j];
+	}
+	return concat;
+}
diff --git a/week10/Exercise10/String.h b/week10/Exercise10/String.h
new file mode 100644
index 0000000..4ae55c0
--- /dev/null
+++ b/week10/Exercise10/String.h
@@ -0,0 +1,21 @@
+#pragma once
+
+class String {
+protected:
+	char* str;
+
+	void free();
+	void copyFrom(const String& other);
+
+public:
+	String();
+	~String();
+	String(const String& other);
+	String& operator=(const String& other);
+	String(String&& other);
+	String& operator=(String&& other);
+
+	friend bool operator==(const String& left, const String& right);
+	friend bool operator!=(const String& left, const String& right);
+	friend String operator+(const String& left, const String& right);
+};