Fix C program by including stdio.h

.gitea/workflows/ci.yml

@@ -6,5 +6,13 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - name: Printing hello
-        run: echo "Hello"
+      - uses: actions/checkout@v4
+      - name: build using gcc
+        run: gcc -Wall -Werror main.c
+
+
+
+
+
+
+

main.c

@@ -0,0 +1,8 @@
+#include <stdio.h>
+
+int main()
+{
+    printf("Halo, Welt!");
+    return 0;
+}
+