Created Function to find calculation function type

src/inputHandling.c

@@ -4,11 +4,13 @@
 
 char a[STRINGL];
 void deleteWhitespace();
+op readFunction(char* data, int length);
 
 void input() {
     printf("Geben Sie eine Rechenoperation ein (Bsp.: 1+1):\n");
     fgets(a, STRINGL, stdin);     //fgets statt scanf, holt den kompletten String inkl. Whitespace
     deleteWhitespace();
+    op b = readFunction(a, 10);
     printf("Ihre Berechnung: %s \n", a);
 }
 
@@ -23,4 +25,16 @@ void deleteWhitespace(){
     }
 }
 
-
+//Einfachste Rechenoperationen lesen
+op readFunction(char* data, int length){
+    for(int i=0; i<length; i++){
+        switch (data[i]){
+            case '+': return opAdd;
+            case '-': return opSub;
+            case '/': return opDiv;
+            case '*': return opMult;
+            case '^': return opExp;
+        }
+    }
+    return opNotSupported;
+}

src/inputHandling.h

@@ -2,7 +2,7 @@
 #define INPUTHANDLING_H
 
 typedef enum{
-    opAdd, opSub, opDiv, opMult, opExp, opLog
+    opAdd, opSub, opDiv, opMult, opExp, opLog, opNotSupported
 }op;
 
 typedef struct {