Support 'const char**' arguments in Options::parse (#250)

`cxxopts` doesn't modify the contents of the argv strings. This changes
the parse function to take a reference to a `const char**`.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/example.cpp b/src/example.cpp
index 9b6ea88..0efb3a4 100644
--- a/src/example.cpp
+++ b/src/example.cpp
@@ -27,7 +27,7 @@ THE SOFTWARE.
 #include "cxxopts.hpp"
 
 void
-parse(int argc, char* argv[])
+parse(int argc, const char* argv[])
 {
   try
   {
@@ -160,7 +160,7 @@ parse(int argc, char* argv[])
   }
 }
 
-int main(int argc, char* argv[])
+int main(int argc, const char* argv[])
 {
   parse(argc, argv);