change getInput to have return

src/input.c

@@ -19,7 +19,7 @@ void Pausieren();
 /** getInput gets the userinput and reacts to input of w,a,s,d, arrow keys, p or q 
   * utilises getch() and kbhit, no parameters, no returns
   */
-void getInput(){
+char getInput(){
   if(kbhit()){  
     char key= getch();
     if(key == '\033'){
@@ -27,16 +27,16 @@ void getInput(){
       char key = getch();
       switch(key){
         case 'A': 
-          printf("up");
+          return 'u';
           break;
         case 'B':
-          printf("down");
+          return 'd';
           break;
         case 'C':
-          printf("right");
+          return 'r';
           break;
         case 'D':
-          printf("left");
+          return 'l';
           break;
       }
     }