Improved code for lesson 6

Author: MakersF

Lesson 6/Activity 25- Retrieving User Information/compile.bat

@@ -0,0 +1,7 @@
+:: Folder where the built objects are stored
+mkdir build
+
+:: Build main.cpp
+cl /EHsc /Fobuild/ /Febuild/ /W4 main.cpp
+
+:: You can not run the program at build\main.exe

Lesson 6/Activity 25- Retrieving User Information/main.cpp

@@ -1,36 +1,36 @@
 #include <iostream>
 
-
 struct UserProfile {};
 struct UserId {};
 
 class UserProfileStorage {
-    public:
-      virtual UserProfile getUserProfile(const UserId& id) const = 0;
-    
-      virtual ~UserProfileStorage() = default;
-    
-    protected:
-      UserProfileStorage() = default;
-      UserProfileStorage(const UserProfileStorage&) = default;
-      UserProfileStorage& operator=(const UserProfileStorage&) = default;
+public:
+    virtual UserProfile getUserProfile(const UserId& id) const = 0;
+
+    virtual ~UserProfileStorage() = default;
+
+protected:
+    UserProfileStorage() = default;
+    UserProfileStorage(const UserProfileStorage&) = default;
+    UserProfileStorage& operator=(const UserProfileStorage&) = default;
 };
 
 class UserProfileCache : public UserProfileStorage {
-    public:
-      UserProfile getUserProfile(const UserId& id) const override {
-      std::cout << "Getting the user profile from the cache" << std::endl;
-      return UserProfile(); }
+public:
+    UserProfile getUserProfile(const UserId& id) const override {
+        std::cout << "Getting the user profile from the cache" << std::endl;
+        return UserProfile();
+    }
 };
+
 void exampleOfUsage(const UserProfileStorage& storage) {
     UserId user;
-    std::cout << "About to retrieve the user profile from the storage"
-<<std::endl;
+    std::cout << "About to retrieve the user profile from the storage" << std::endl;
     UserProfile UserProfile = storage.getUserProfile(user);
 }
 
 int main()
 {
     UserProfileCache cache;
-    exampleOfUsage (cache);
-}
+    exampleOfUsage(cache);
+}

Lesson 6/Activity 26- Creating a Factory for User Profile Storage/compile.bat

@@ -2,9 +2,9 @@
 mkdir build
 
 :: Build main.cpp
-:: We include the header from Activity 18, so we can reuse the types defined there
-:: To do it, we created a symbolic link in the current folder to the header in Activity 18
-:: so that it's easy to access the file while working from the folder for Activity 19
+:: We copied some structures from Activity 25, so we can reuse the types defined there.
+:: Since we put them in an header, we need to tell the compiler to look for the headers
+:: in the current folder when including headers.
 cl /EHsc /Fobuild/ /Febuild/ /W4 /I . main.cpp
 
 :: You can not run the program at build\main.exe

Lesson 6/Activity 26- Creating a Factory for User Profile Storage/main.cpp

@@ -1,6 +1,6 @@
 #include <iostream>
 #include <memory>
-#include <userprofile_activity18.h>
+#include <userprofilestorage_activity25.h>
 
 class UserProfileStorageFactory {
 public:

Lesson 6/Activity 26- Creating a Factory for User Profile Storage/userprofile_activity18.h

@@ -0,0 +1,29 @@
+#ifndef USER_PROFILE_STORAGE_H
+#define USER_PROFILE_STORAGE_H
+
+// Copied from Activity 25
+
+struct UserProfile {};
+struct UserId {};
+
+class UserProfileStorage {
+public:
+    virtual UserProfile getUserProfile(const UserId& id) const = 0;
+
+    virtual ~UserProfileStorage() = default;
+
+protected:
+    UserProfileStorage() = default;
+    UserProfileStorage(const UserProfileStorage&) = default;
+    UserProfileStorage& operator=(const UserProfileStorage&) = default;
+};
+
+class UserProfileCache : public UserProfileStorage {
+public:
+    UserProfile getUserProfile(const UserId& id) const override {
+        std::cout << "Getting the user profile from the cache" << std::endl;
+        return UserProfile();
+    }
+};
+
+#endif

Lesson 6/Activity 26- Creating a Factory for User Profile Storage/userprofilestorage_activity25.h

@@ -0,0 +1,7 @@
+:: Folder where the built objects are stored
+mkdir build
+
+:: Build main.cpp
+cl /EHsc /Fobuild/ /Febuild/ /W4 main.cpp
+
+:: You can not run the program at build\main.exe

Lesson 6/Activity 27-Using a Database Connection for Multiple Operations/compile.bat

@@ -1,24 +1,35 @@
 #include <future>
+#include <iostream>
 
 struct DatabaseConnection {};
 
-void updateOrderList(DatabaseConnection&) {}
-void scheduleOrderProcessing(DatabaseConnection&) {}
+void updateOrderList(DatabaseConnection&) {
+    std::cout << "Updating order list" << std::endl;
+}
+
+void scheduleOrderProcessing(DatabaseConnection&) {
+    std::cout << "Schedule order processing" << std::endl;
+}
+
 /* We need to get a copy of the shared_ptr so it stays alive until this
 function finishes */
-void updateWithConnection(std::shared_ptr<DatabaseConnection>
-connection) {
+void updateWithConnection(std::shared_ptr<DatabaseConnection> connection) {
     updateOrderList(*connection);
 }
+
 /* We need to get a copy of the shared_ptr so it stays alive until this
 function finishes. */
-void scheduleWithConnection(std::shared_ptr<DatabaseConnection>
-connection) {
+void scheduleWithConnection(std::shared_ptr<DatabaseConnection> connection) {
     scheduleOrderProcessing(*connection);
 }
+
 int main()
 {
     std::shared_ptr<DatabaseConnection> connection = std::make_shared<DatabaseConnection>();
-    std::async(std::launch::async, updateWithConnection, connection);
-    std::async(std::launch::async, scheduleWithConnection, connection);
-}
+    std::cout << "Updating order and scheduling order processing in parallel" << std::endl;
+    auto updateResult = std::async(std::launch::async, updateWithConnection, connection);
+    auto scheduleResult = std::async(std::launch::async, scheduleWithConnection, connection);
+
+    updateResult.wait();
+    scheduleResult.wait();
+}

Lesson 6/Activity 27-Using a Database Connection for Multiple Operations/main.cpp

@@ -0,0 +1,7 @@
+:: Folder where the built objects are stored
+mkdir build
+
+:: Build main.cpp
+cl /EHsc /Fobuild/ /Febuild/ /W4 main.cpp
+
+:: You can not run the program at build\main.exe

Lesson 6/Exercise 20 Creating a Program to Illustrate Inheritance in C++/compile.bat

@@ -1,12 +1,12 @@
 #include <iostream>
+
 // first base class
 class Vehicle {
     public:
     int getTankCapacity(){
         const int tankLiters = 10;
-        std::cout << "The current tank capacity for your car is " <<
-tankLiters << " Liters."<<std::endl;
-      return tankLiters;
+        std::cout << "The current tank capacity for your car is " << tankLiters << " Liters."<<std::endl;
+        return tankLiters;
     }
 };
 
@@ -21,18 +21,17 @@ class CollectorItem {
 // Subclass derived from two base classes
 class Ferrari250GT: protected Vehicle, public CollectorItem {
     public:
-      Ferrari250GT() {
-         std::cout << "Thank you for buying the Ferrari 250 GT with tank capacity " << getTankCapacity() << std::endl;
-        //return 0;
-      }
+    Ferrari250GT() {
+        std::cout << "Thank you for buying the Ferrari 250 GT with tank capacity " << getTankCapacity() << std::endl;
+    }
 };
 
 int main()
 {
     Ferrari250GT ferrari;
     std::cout << "The value of the Ferrari is " << ferrari.getValue() <<
     std::endl;
-    
+
     /* Cannot call ferrari.getTankCapacity() because Ferrari250GT inherits from Vehicle with the protected specifier */
-return 0;
+    return 0;
 };

Lesson 6/Exercise 20 Creating a Program to Illustrate Inheritance in C++/main.cpp

@@ -0,0 +1,7 @@
+:: Folder where the built objects are stored
+mkdir build
+
+:: Build main.cpp
+cl /EHsc /Fobuild/ /Febuild/ /W4 main.cpp
+
+:: You can not run the program at build\main.exe

Lesson 6/Exercise 21 Using Multiple Inheritance to Create a Welcome to the/compile.bat

@@ -1,26 +1,23 @@
 #include <iostream>
 
 class DataScienceDev {
-    public:
-        DataScienceDev(){
-            std::cout << "Welcome to the Data Science Developer Community."
-    << std::endl;
-        }
+public:
+    DataScienceDev(){
+        std::cout << "Welcome to the Data Science Developer Community." << std::endl;
+    }
 };
 
 class FutureCppDev {
-    public:
-        FutureCppDev(){
-            std::cout << "Welcome to the C++ Developer Community." <<
-    std::endl;
-        }
+public:
+    FutureCppDev(){
+        std::cout << "Welcome to the C++ Developer Community." << std::endl;
+    }
 };
 
 class Student : public DataScienceDev, public FutureCppDev {
-    public:
+public:
     Student(){
-        std::cout << "Student is a Data Developer and C++ Developer."
-    << std::endl;
+        std::cout << "Student is a Data Developer and C++ Developer." << std::endl;
     }
 };
 

Lesson 6/Exercise 21 Using Multiple Inheritance to Create a Welcome to the/main.cpp

@@ -0,0 +1,7 @@
+:: Folder where the built objects are stored
+mkdir build
+
+:: Build main.cpp
+cl /EHsc /Fobuild/ /Febuild/ /W4 main.cpp
+
+:: You can not run the program at build\main.exe

Lesson 6/Exercise 22 Exploring the Virtual Method/compile.bat

@@ -1,22 +1,21 @@
 #include <iostream>
 
 class Vehicle {
-    public:
-        void turnOn(){
-            std::cout<< "Vehicle: turn on" << std::endl;
-        }
+public:
+    virtual void turnOn(){
+        std::cout<< "Vehicle: turn on" << std::endl;
+    }
 };
 
 class Car : public Vehicle {
-    public:
-        virtual void turnOn() {
-            std::cout << "Car: turn on" << std::endl;
-        }
+public:
+    virtual void turnOn() {
+        std::cout << "Car: turn on" << std::endl;
+    }
 };
 
 void myTurnOn(Vehicle& vehicle) {
-    std::cout << "Calling turnOn() on the vehicle reference" <<
-std::endl;
+    std::cout << "Calling turnOn() on the vehicle reference" << std::endl;
     vehicle.turnOn();
 }