Adding library

.gitignore

@@ -0,0 +1 @@
+.vscode

course/3/CMakeLists.txt

@@ -0,0 +1,13 @@
+cmake_minimum_required(VERSION 3.12)
+
+project(HelloWorldProject VERSION 1.0.0)
+
+add_library(
+    HelloLibrary
+    hello-library.hpp
+    hello-library.cpp
+)
+
+add_executable(HelloApp main.cpp)
+
+target_link_libraries(HelloApp PRIVATE HelloLibrary)

course/3/build/.gitignore

@@ -0,0 +1,2 @@
+*
+!.gitignore

course/3/hello-library.cpp

@@ -0,0 +1,7 @@
+#include "hello-library.hpp"
+#include <iostream>
+
+void HelloLibrary::showHello()
+{
+    std::cout<<"Hello world"<<std::endl;
+}

course/3/hello-library.hpp

@@ -0,0 +1,9 @@
+#ifndef HELLO_LIBRARY_HPP
+#define HELLO_LIBRARY_HPP 1
+
+namespace HelloLibrary
+{
+    void showHello();
+}
+
+#endif

course/3/main.cpp

@@ -0,0 +1,8 @@
+#include <iostream>
+#include "hello-library.hpp"
+
+int main()
+{
+    HelloLibrary::showHello();
+    return 0;
+}