[w7] Added exercise descriptions and solutions

1 files changed, 139 insertions, 0 deletions

diff --git a/week07/Exercise4.cpp b/week07/Exercise4.cpp
new file mode 100644
index 0000000..50eb587
--- /dev/null
+++ b/week07/Exercise4.cpp
@@ -0,0 +1,139 @@
+#include "Exercise4.h"
+#include <fstream>
+#include <iostream>
+#include <cstring>
+
+/* Private */
+
+void Street::free() {
+	delete[] name;
+}
+void Street::copyFrom(const Street& other) {
+	this->number = other.number;
+	this->name = new char[strlen(other.name)+1];
+	strcpy(this->name, other.name);
+}
+
+/* Public */
+
+Street::Street(const char* name, int number) {
+	this->number = number;
+	this->name = new char[strlen(name)+1];
+	strcpy(this->name, name);
+}
+
+void Street::Print() {
+	std::cout << name << " " << number << std::endl;
+}
+
+Street::Street() {
+	this->name = nullptr;
+	this->number = 0;
+}
+Street::~Street() {
+	free();
+}
+Street::Street(const Street& other) {
+	copyFrom(other);
+}
+Street& Street::operator=(const Street& other) {
+	if (this != &other) {
+		free();
+		copyFrom(other);
+	}
+	return *this;
+}
+Street::Street(Street&& other) {
+	this->name = other.name;
+	this->number = other.number;
+
+	other.name = nullptr;
+}
+Street& Street::operator=(Street&& other) {
+	if (this != &other) {
+		free();
+
+		this->name = other.name;
+		this->number = other.number;
+
+		other.name = nullptr;
+	}
+	return *this;
+}
+
+void Street::SaveText(const char* fileName) {
+	std::ofstream outFile(fileName);
+	if (!outFile.is_open()) {
+		return;
+	}
+
+	outFile << number << ',' << name;
+	outFile.close();
+}
+void Street::LoadText(const char* fileName) {
+	std::ifstream inFile(fileName);
+	if (!inFile.is_open()) {
+		return;
+	}
+
+	free();
+
+	inFile >> number;
+	inFile.ignore();
+
+	unsigned nameStart = inFile.tellg();
+	inFile.seekg(0, std::ios::end);
+	unsigned nameLen = (unsigned)inFile.tellg() - nameStart + 1;
+	inFile.seekg(nameStart, std::ios::beg);
+
+	name = new char[nameLen+1];
+	inFile.get(name, nameLen);
+	name[nameLen] = '\0';
+
+	inFile.close();
+}
+
+void Street::SaveBinary(const char* fileName) {
+	std::ofstream outFile(fileName, std::ios::binary);
+	if (!outFile.is_open()) {
+		return;
+	}
+
+	outFile.write((const char*)&number, sizeof(number));
+	outFile.write(name, sizeof(char) * (strlen(name)+1));
+
+	outFile.close();
+}
+void Street::LoadBinary(const char* fileName) {
+	std::ifstream inFile(fileName, std::ios::binary);
+	if (!inFile.is_open()) {
+		return;
+	}
+
+	inFile.seekg(0, std::ios::end);
+	unsigned nameLen = (unsigned)inFile.tellg() - sizeof(number);
+	inFile.seekg(0, std::ios::beg);
+
+	free();
+
+	inFile.read((char*)&number, sizeof(number));
+	name = new char[nameLen];
+	inFile.read(name, nameLen);
+
+	inFile.close();
+}
+
+int main() {
+	Street s1("Hollywood Blvd", 13);
+	s1.SaveText("s1.txt");
+
+	Street s2("Djeims Baucher", 5);
+	s2.SaveBinary("s2.dat");
+
+	Street s3;
+	s3.LoadText("s1.txt");
+	s3.Print();
+
+	s3.LoadBinary("s2.dat");
+	s3.Print();
+}