diff --git a/.gitignore b/.gitignore
index e37180c..1eb3554 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,9 @@
 *
 
+!src
+!src/main.cpp
+
+
 !CMakeLists.txt
 !.ignore
 !.gitignore
@@ -7,3 +11,4 @@
 !README.md
 
 !.clang-format
+
diff --git a/src/main.cpp b/src/main.cpp
new file mode 100644
index 0000000..3b9896d
--- /dev/null
+++ b/src/main.cpp
@@ -0,0 +1,6 @@
+#include <iostream>
+
+int main() {
+  std::cout << "Hello, world!" << std::endl;
+  return 0;
+}