1 files changed, 47 insertions, 0 deletions
diff --git a/week04/Exercise4.cpp b/week04/Exercise4.cpp
new file mode 100644
index 0000000..3716287
--- /dev/null
+++ b/week04/Exercise4.cpp
@@ -0,0 +1,47 @@
+#include <iostream>
+#include <cstring>
+
+struct DynamicString {
+private:
+	char* str;
+	int size;
+
+	void copyFrom(const DynamicString& other) {
+		this->str = new char[other.size + 1];
+		strncpy(this->str, other.str, other.size + 1);
+		this->size = other.size;
+	}
+
+	void free() {
+		delete[] str;
+	}
+
+public:
+	DynamicString(const char* str) {
+		size = strlen(str);
+		this->str = new char[size + 1];
+		strncpy(this->str, str, size + 1);
+	}
+	~DynamicString() {
+		free();
+	}
+
+	DynamicString& operator=(const DynamicString& other) {
+		if (this != &other) {
+			free();
+			copyFrom(other);
+		}
+		return *this;
+	}
+
+	const char* GetStr() {
+		return str;
+	}
+};
+
+int main() {
+	DynamicString s1("Hello");
+	DynamicString s2("World");
+	s1 = s2;
+	std::cout << s1.GetStr() << std::endl;
+}