gh-233: add required header to examples

vkutuev · vkutuev · commit da22861da8e9 · 2025-05-20T11:44:12.000+03:00
diff --git a/examples/options.hpp b/examples/options.hpp
@@ -29,6 +29,7 @@
 #define SPLA_OPTIONS_HPP
 
 #include <cxxopts.hpp>
+#include <iostream>
 
 #define OPT_MTXPATH      "mtxpath"
 #define OPT_NITERS       "niters"
