structure, layout, parser and its modules

check/check.cpp

@@ -0,0 +1,14 @@
+#include "check.h"
+#include "../goods/goods.h"
+
+Check::Check() {}
+void Check::add_goods(Goods goods) { this->goods.push_back(goods); }
+double Check::calculae_total_price() {
+    double total = 0.0;
+
+    for (Goods g : this->goods) {
+        total += g.calculate_total_price();
+    }
+
+    return total;
+}