feat: add main4

__ffi/c_layout/src/main_3.rs

@@ -20,7 +20,7 @@ fn parse<P: AsRef<Path>>(path: P) -> Result<()> {
         unsafe { mem::transmute(h) }
     };
 
-    println!("{:#?}", header);
+    println!("{:?}", header);
     Ok(())
 }
 fn write<P: AsRef<Path>>(path: P, h: Header) -> Result<()> {