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

.travis.yml

diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..5ce5a53
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,12 @@
+language: cpp
+
+sudo: required
+
+dist: trusty
+
+compiler:
+  - gcc
+
+script:
+  - make clean all
+  - ./exprtk_test