Add parser

1 files changed, 10 insertions, 0 deletions

diff --git a/src/substraction.cpp b/src/substraction.cpp
new file mode 100644
index 0000000..ba995b5
--- /dev/null
+++ b/src/substraction.cpp
@@ -0,0 +1,10 @@
+#include "include/substraction.hpp"
+#include "include/syntax_tree.hpp"
+
+
+Substraction::Substraction(SyntaxTree *left, SyntaxTree *right)
+  : SyntaxTree{left, right} {}
+
+float Substraction::eval() const {
+  return left->eval() - right->eval();
+}