diff --git a/src/inputHandling.c b/src/inputHandling.c
index 6e8615d..8388c59 100644
--- a/src/inputHandling.c
+++ b/src/inputHandling.c
@@ -22,3 +22,5 @@ void deleteWhitespace(){
         }
     }
 }
+
+
diff --git a/src/inputHandling.h b/src/inputHandling.h
index b73a64c..9e9a011 100644
--- a/src/inputHandling.h
+++ b/src/inputHandling.h
@@ -1,6 +1,19 @@
 #ifndef INPUTHANDLING_H
 #define INPUTHANDLING_H
 
+typedef enum{
+    opAdd, opSub, opDiv, opMult, opExp, opLog
+}op;
+
+typedef struct {
+op funktionstyp;
+char* formel;
+double array[10];
+void* child;
+double result;
+}calc_op;
+
 extern void input();
 
+
 #endif // INPUTHANDLING_H