C++ Mathematical Expression Library (ExprTk)  http://www.partow.net/programming/exprtk/index.html

.travis.yml

diff --git a/.travis.yml b/.travis.yml
index 707c812..3f7ada7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,8 +1,7 @@
-# Enable C++ support
 language: cpp
-# Compiler selection
+
 compiler:
   - gcc
-# Build steps
+
 script:
   - make clean all