added main.c

.gitea/workflows/ci.yml

@@ -5,5 +5,6 @@ jobs:
     build:
         runs-on: ubuntu-latest
         steps:
+          - uses: actions/checkout@v4
           - name: Printing hello
-            run: echo "Hello, 🌎"
+            run: gcc -Wall -Werror main.c

.gitea/workflows/main.c

@@ -0,0 +1,5 @@
+int main()
+{
+	printf("Halo, Welt!");
+	return 0;
+}