[w6] Added exercise descriptions and solutions to 1-9

1 files changed, 69 insertions, 0 deletions

diff --git a/week06/Exercise04.cpp b/week06/Exercise04.cpp
new file mode 100644
index 0000000..95aa007
--- /dev/null
+++ b/week06/Exercise04.cpp
@@ -0,0 +1,69 @@
+#include <fstream>
+#include <iostream>
+
+// Отивайки в края и тръгвайки към началото
+void Method1(std::ifstream& file) {
+	file.seekg(0, std::ios::end);
+	size_t endPos = file.tellg();
+
+	while (!file.fail() && file.peek() != '\n') {
+		file.seekg(-1, std::ios::cur);
+	}
+	file.clear();
+
+	if (file.tellg() > 0) {
+		file.seekg(1, std::ios::cur);
+	}
+	size_t lineLength = endPos - file.tellg() + 1;
+
+	char* buffer = new char[lineLength + 1];
+	file.getline(buffer, lineLength);
+	buffer[lineLength] = '\0';
+
+	std::cout << buffer << std::endl;
+
+	delete[] buffer;
+}
+
+// Започвайки от началото и ходейки към края
+void Method2(std::ifstream& file) {
+	file.seekg(0, std::ios::end);
+	size_t lastIndex = file.tellg();
+
+	file.seekg(0, std::ios::beg);
+	size_t lastNewLine = 0;
+
+	while (!file.eof()) {
+		if (file.get() == '\n') {
+			lastNewLine = file.tellg();
+		}
+	}
+	file.clear();
+
+	file.seekg(lastNewLine, std::ios::beg);
+	size_t lineLength = lastIndex - file.tellg() + 1;
+
+	char* buffer = new char[lineLength + 1];
+	file.getline(buffer, lineLength);
+	buffer[lineLength] = '\0';
+
+	std::cout << buffer << std::endl;
+
+	delete[] buffer;
+}
+
+int main() {
+	char fileName[1024];
+	std::cin.getline(fileName, 1024);
+
+	std::ifstream file(fileName);
+	if (!file.is_open()) {
+		std::cout << "Couldn't open file!" << std::endl;
+		return 1;
+	}
+
+	Method1(file);
+	Method2(file);
+
+	file.close();
+}