feat(Week04): Add solutions

2 files changed, 71 insertions, 0 deletions

diff --git a/Week04/Exercise02/IntArray.cpp b/Week04/Exercise02/IntArray.cpp
new file mode 100644
index 0000000..2dc0521
--- /dev/null
+++ b/Week04/Exercise02/IntArray.cpp
@@ -0,0 +1,27 @@
+#include "IntArray.h"
+
+int IntArray::At(unsigned index) {
+	if (index < capacity)
+		return elems[index];
+	return 0;
+}
+
+void IntArray::Resize(unsigned capacity) {
+	int* newElems = new int[capacity];
+
+	unsigned copyCount = this->capacity < capacity ? this->capacity : capacity;
+	for (unsigned i = 0; i < copyCount; ++i)
+		newElems[i] = elems[i];
+
+	delete[] elems;
+	elems = newElems;
+	this->capacity = capacity;
+}
+
+void IntArray::Concat(const IntArray& endElements) {
+	unsigned oldCapacity = capacity;
+	Resize(capacity + endElements.capacity);
+
+	for (unsigned i = oldCapacity; i < capacity; ++i)
+		elems[i] = endElements.elems[i - oldCapacity];
+}
diff --git a/Week04/Exercise02/IntArray.h b/Week04/Exercise02/IntArray.h
new file mode 100644
index 0000000..0ed99c9
--- /dev/null
+++ b/Week04/Exercise02/IntArray.h
@@ -0,0 +1,44 @@
+#ifndef _INTARRAY
+#define _INTARRAY
+
+class IntArray {
+	int* elems;
+	unsigned capacity;
+
+	/* Как трябва да изглежда голяма четворка: */
+
+	void free() {
+		delete[] elems;
+	}
+	void copyFrom(const IntArray& other) {
+		capacity = other.capacity;
+
+		elems = new int[capacity];
+		for (unsigned i = 0; i < capacity; ++i)
+			elems[i] = other.elems[i];
+	}
+public:
+	IntArray() {
+		elems = nullptr;
+		capacity = 0;
+	}
+	~IntArray() {
+		free();
+	}
+	IntArray(const IntArray& other) {
+		copyFrom(other);
+	}
+	IntArray& operator=(const IntArray& other) {
+		if (this != &other) {
+			free();
+			copyFrom(other);
+		}
+		return *this;
+	}
+
+	int At(unsigned index);
+	void Resize(unsigned capacity);
+	void Concat(const IntArray& endElements);
+};
+
+#endif /* _INTARRAY */