====== Programmieren lernen mit Karel ======
{{tag>Karel}}
  * Karel bei FredOverflow auf [[https://github.com/fredoverflow/karel|GitHub]]
  * [[https://www.youtube.com/watch?v=IdbLJKs2K0g&list=PL5vhQpd0v6Y5dVcY8_9Ru6dANaz6UmPnL|Karel Playlist]] von Fred Überlauf
  * [[https://www.youtube.com/watch?v=MLIWyMXEo_U&list=PL0VBitL0dCgQhvP6Nob7_SeMCnKtH6Lk8|Karel Lösungen]] Christian Ottenhaus

===== Sequenzen =====
<codedoc code:c++>
void karelsFirstProgram()
{
    moveForward();
    pickBeeper();
    moveForward();
    turnLeft();
    moveForward();
    turnRight();
    moveForward();
    dropBeeper();
    moveForward(); 
}
</codedoc>
===== Schleifen =====
<codedoc code:c++>
void defuseOneBomb()
{
    moveForward();
    moveForward();
    moveForward();
    moveForward();
    moveForward();
    moveForward();
    moveForward();
    moveForward();
    moveForward();
    turnAround();
    pickBeeper();
    turnAround();
    moveForward();
    moveForward();
    moveForward();
    moveForward();
    moveForward();
    moveForward();
    moveForward();
    moveForward();
    moveForward();
    turnAround();
}
</codedoc>
<codedoc code:c++>
void defuseOneBomb()
{
    repeat(9){
        moveForward()
    }
    pickBeeper();
    turnAround();
    repeat(9){
        moveForward()
    }
    turnAround();
}
</codedoc>
===== 1.1.3 defuseTwoBombs =====
<codedoc code:c++>
void defuseTwoBombs(){
    defuseOneBomb();
    turnLeft();
    defuseOneBomb();
}

void defuseOneBomb()
{
    goOneWay();
    pickBeeper();
    goOneWay();
}

void goOneWay(){
    repeat(9){
        moveForward();
    }
    turnAround();
}
</codedoc>


===== Funktionen =====
<codedoc code:c++>
void defuseOneBomb()
{
    goOneWay()
    pickBeeper();
    goOneWay()
}

void goOneWay(){
    repeat(9){
        moveForward()
    }
    turnAround();
}
</codedoc>
<codedoc code:c++>
void defuseTwoBombs(){
    defuseOneBomb();
    turnLeft();
    defuseOneBomb();
}

void defuseOneBomb()
{
    goOneWay();
    pickBeeper();
    goOneWay();
}

void goOneWay(){
    repeat(9){
        moveForward();
    }
    turnAround();
}
</codedoc>
===== Bedingungen / Verzweigungen =====
<codedoc code:c++>
if (onBeeper()){
    pickBeeper();
}
</codedoc>
<codedoc code:c++>
if (onBeeper()){
    pickBeeper();
}
else{
    dropBeeper();
}
</codedoc>
==== Bedingungen ====
^ Bedingung       ^ Anmerkung                                                                    ^
| onBeeper()      | Karel checks whether a beeper is on the square he currently stands on.       |
| beeperAhead()   | Karel checks whether a beeper is on the square immediately in front of him.  |
| leftIsCleear()  | Karel checks whether no wall is between him and the square to his left.      |
| frontIsClear()  | Karel checks whether no wall is between him and the square in front of him.  |
| rightIsClear()  | Karel checks whether no wall is between him and the square to his right.     |


===== Generalisieren =====
<codedoc code:c++>
void repairHole(){
    turnRight();
    moveForward();
    dropBeeper();
    turnAround();
    moveForward();
    turnRight();
    moveForward();
}

void repairTheStreet(){
    while(frontIsClear()){
        if(rightIsClear()){
            repairHole();
        }
        else{
            moveForward();   
        }
    }
}
</codedoc>