refactoring: add further documentation to input.c

src/input.c

@@ -91,6 +91,10 @@ void Pausieren(){
 
 
 //khbit und getch aus dem Internet
+
+/**checks if there was a console input
+  *returns int, no parameter
+  */
 int kbhit(void){
   struct termios oldt, newt;
   int ch;
@@ -117,6 +121,10 @@ int kbhit(void){
   return 0;
 }
 
+
+/**returns the char from console
+  *returns char, no parameter
+  */
 char getch(void){
     char c;
     system("stty raw");