feat(Week10): Add solutions

1 files changed, 91 insertions, 0 deletions

diff --git a/Week10/Exercise03/Shop.cpp b/Week10/Exercise03/Shop.cpp
new file mode 100644
index 0000000..4ed8ce3
--- /dev/null
+++ b/Week10/Exercise03/Shop.cpp
@@ -0,0 +1,91 @@
+#include "Shop.h"
+#include <cstring>
+#include <utility>
+
+void Shop::free() {
+	delete[] sales;
+}
+
+void Shop::copyFrom(const Shop& other) {
+	salesAlloc = other.salesAlloc;
+	salesCount = other.salesCount;
+
+	sales = new Sale[salesAlloc];
+	for (unsigned i = 0; i < salesCount; ++i)
+		sales[i] = other.sales[i];
+}
+
+void Shop::resize() {
+	salesAlloc = salesAlloc == 0 ? 8 : salesAlloc * 2;
+	Sale* salesLarger = new Sale[salesAlloc];
+
+	for (unsigned i = 0; i < salesCount; ++i)
+		salesLarger[i] = sales[i];
+
+	delete[] sales;
+	sales = salesLarger;
+}
+
+Shop::Shop() : Inventory(), sales(), salesCount(), salesAlloc()
+{ }
+
+Shop::~Shop() {
+	free();
+}
+
+Shop::Shop(const Shop& other) : Inventory(other) {
+	copyFrom(other);
+}
+
+Shop& Shop::operator=(const Shop& other) {
+	if (this != &other) {
+		Inventory::operator=(other);
+		free();
+		copyFrom(other);
+	}
+	return *this;
+}
+
+Shop::Shop(Shop&& other) : Inventory(std::move(other)) {
+	sales = other.sales;
+	salesCount = other.salesCount;
+	salesAlloc = other.salesAlloc;
+
+	other.sales = nullptr;
+	other.salesAlloc = other.salesCount = 0;
+}
+
+Shop& Shop::operator=(Shop&& other) {
+	if (this != &other) {
+		Shop::operator=(std::move(other));
+
+		free();
+
+		sales = other.sales;
+		salesCount = other.salesCount;
+		salesAlloc = other.salesAlloc;
+
+		other.sales = nullptr;
+		other.salesAlloc = other.salesCount = 0;
+	}
+	return *this;
+}
+
+bool Shop::Purchase(const Sale& sale) {
+	unsigned productIndex = 0;
+	while (productIndex < productsCount &&
+	       strcmp(sale.productName, products[productIndex].name) != 0)
+	{
+		++productIndex;
+	}
+
+	if (productIndex == productsCount || products[productIndex].quantity >= sale.quantity)
+		return false;
+
+	if (salesCount >= salesAlloc)
+		resize();
+	sales[salesCount++] = sale;
+
+	products[productIndex].quantity -= sale.quantity;
+	return true;
+}