add function for user input

src/main/c/Georg/tictactoe.c

@@ -67,18 +67,26 @@ commandFunction getCommandById( struct command* commands, int id ){
     return result;
 }
 
+char* getUserInput(){
+    static char userInput[MAX_INPUT_LENGTH];
+    printf( ":" );
+    fgets(userInput, sizeof(userInput), stdin);
+
+    size_t len = strlen(userInput);
+    if (len > 0 && userInput[len - 1] == '\n') {
+        userInput[len - 1] = '\0';
+    }
+
+    return userInput;
+}
+
 int startMenu( int code ){
     if( code == 1 ){ // command test
         return 1;
     }
 
     while( GAME.currentState == 0 ){
-        char userInput[50];
-        printf( ":" );
-        scanf( "%s", &userInput );
-
-        int nextState = 0;
-        nextState = handleCommand(userInput);
+        int nextState = handleCommand( getUserInput() );
 
         if( nextState == -1 ){
             printf("command not found!");

src/main/c/Georg/tictactoe.h

@@ -1,6 +1,8 @@
 #ifndef TICTACTOE_H
 #define TICTACTOE_H
 
+#define MAX_INPUT_LENGTH 20
+
 struct ticTacToe{
     int currentState;
 };