Cleanup: Include Order

A typical include order in C++ is:

- "module header" (local header)
- "own headers" (WarpX)
- <close library headers> (AMReX)
- <other third party headers> (e.g. omp)
- <stdlib headers>

This avoids that a "forgotten include" will silently compile
in some compilers and crash in others (because it will crash
in all).

References:
- https://llvm.org/docs/CodingStandards.html#include-style
- https://include-what-you-use.org

1 files changed, 3 insertions, 4 deletions

diff --git a/Source/main.cpp b/Source/main.cpp
index d89e89e47..d31268b12 100644
--- a/Source/main.cpp
+++ b/Source/main.cpp
@@ -1,13 +1,12 @@
-
-#include <iostream>
+#include <WarpX.H>
+#include <WarpXUtil.H>
 
 #include <AMReX.H>
 #include <AMReX_ParmParse.H>
 #include <AMReX_BLProfiler.H>
 #include <AMReX_ParallelDescriptor.H>
 
-#include <WarpX.H>
-#include <WarpXUtil.H>
+#include <iostream>
 
 using namespace amrex;