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MrGeorgen
2021-10-09 20:23:02 +02:00
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.gitignore vendored Normal file
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CMakeFiles
.cache
a[1-5]

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[submodule "a2-Vollgeladen/lib/advanced_C_standard_library"]
path = a2-Vollgeladen/lib/advanced_C_standard_library
url = https://git.zinkel.org/MrGeorgen/advanced_C_standard_library.git

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a1-Schiebeparkplatz/Aufgabe1.md Normal file
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# Schiebeparkplatz
## Lösungsidee
Für jede normale Textdatei wird ASCII encoding verwendet bzw. ein Encoding
Standart welcher auf ASCII basiert und zusätzliche Sonderzeichen enthält,
wobei die Werte die bereits in ASCII enthalten übernommen wurden.
Die ASCII codes für die Buchstaben sind entsprechend des Alphabets
hintereinander angeordnet. Dies ist sehr nützlich, da somit eine Liste der
Buchstaben und deren Position im Alphabet nicht benötigt wird.<br>
Zur Lösung des Parkplatzproblems werden die Autos wenn möglich nach links bzw.
rechts verschoben bis die Parklücke frei ist. Je nachdem in welche Richtung
weniger Autos verschoben werden müssen, wird die Verschiebungsrichtung gewählt.
## Umsetzung
Da die Lösung des Problem keine besondere Library benötigt wird und die Anforderungen
an die Ausführungsgeschwindigkeit gering sind, hätte man fast jede Progmiersprache
wählen können. Ich habe mich für Go entschieden.<br>
Das Programm akzeptiert als Argumente eine beliebige Anzahl an Pfaden zu Parkplatzdatein.
Für das Iterieren über die Argumente wird eine for-Schleife benutzt.
Innerhalb der Schleife wird die Eingabedatei ausgelesen. Anhand des ersten und letzten
Buchstaben der Autos auf den normalen Parkplätzen wird die die Anzahl an Parkplätzen
bestimmt. Anschließend wird eine Slice (ein dynamisch vergrößerbares Array in Go)
mit den Buchstaben der quer parkenden Autos befüllt an den Indexen an denen sie die
normalen Parkplätze blockieren.<br>
In einer for-Schleife wird die "move"-Funktion je Index der Parkplätze doppelt
für beide Verschiebungsrichtungen aufgerufen.
In der "move"-Funktion wird ein Auto verschoben, wenn nicht das Ende des
Parkplatzes erreicht ist. Die Funktion ruft sich recursive auf um weitere Autos zu
verschieben. Je nachdem in welche Richtung weniger Autos verschoben werden müssen
oder, wenn es gleich viele sind, wo die Anzahl der verschobenen Plätze aller Autos
geringer ist, wird sich für das Verschieben in diese Richtung entschieden.
## Beispiele
```
parkplatz0.txt:
A:
B:
C: H 1 rechts
D: H 1 links
E:
F: H 1 links, I 2 links
G: I 1 links
parkplatz1.txt:
A:
B: O 1 rechts, P 1 rechts
C: O 1 links
D: P 1 rechts
E: O 1 links, P 1 links
F:
G: Q 1 rechts
H: Q 1 links
I:
J:
K: R 1 rechts
L: R 1 links
M:
N:
parkplatz2.txt:
A:
B:
C: O 1 rechts
D: O 1 links
E:
F: O 1 links, P 2 links
G: P 1 links
H: Q 1 rechts, R 1 rechts
I: P 1 links, Q 1 links
J: R 1 rechts
K: P 1 links, Q 1 links, R 1 links
L:
M: P 1 links, Q 1 links, R 1 links, S 2 links
N: S 1 links
parkplatz3.txt:
A:
B: O 1 rechts
C: O 1 links
D:
E: P 1 rechts
F: P 1 links
G:
H:
I: Q 2 links
J: Q 1 links
K: Q 2 links, R 2 links
L: Q 1 links, R 1 links
M: Q 2 links, R 2 links, S 2 links
N: Q 1 links, R 1 links, S 1 links
parkplatz4.txt:
A: Q 1 rechts, R 1 rechts
B: Q 2 rechts, R 2 rechts
C: R 1 rechts
D: R 2 rechts
E:
F:
G: S 1 rechts
H: S 1 links
I:
J:
K: T 1 rechts
L: T 1 links
M:
N: U 1 rechts
O: U 1 links
P:
parkplatz5.txt:
A:
B:
C: P 2 links
D: P 1 links
E: Q 1 rechts
F: Q 2 rechts
G:
H:
I: R 1 rechts
J: R 1 links
K:
L:
M: S 1 rechts
N: S 1 links
O:
```

58
a1-Schiebeparkplatz/src/main.go
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@ -5,7 +5,6 @@ import (
"io/ioutil"
"strings"
"strconv"
"math"
"fmt"
"sort"
)
@ -18,39 +17,62 @@ type movedCar struct {
var querAutos []byte
func main() {
// Dem Programm können beliebig viele Eingabedatein übergeben werden.
for _, filepath := range os.Args[1:] {
fmt.Printf("%s: \n", filepath)
rawFile, err := ioutil.ReadFile(filepath)
// ausgeben des Dateipfades, um Zuordnung der Lösung zu der entsprechenden Eingabedatei zu ermöglichen
fmt.Printf("%s:\n", filepath)
rawFile, err := ioutil.ReadFile(filepath) // lesen der Eingabedatei
throw(err)
input := string(rawFile)
firstChar := input[0]
firstChar := input[0] // firstChar ist der Buchstabe mit dem das erste Auto gekennzeichnet wird.
/* querAutos ist ein Array bzw. slice, wie dynamisch vergrößerbare Arrays in Go benannt werden,
welches die Autos, die quer auf dem Parkplatz parken, enthält. input[2] ist der Buchstabe vom letztem Auto.
Die Größe der slice bzw. die Anzahl der senkrecht parkenden Autos wird durch die Differenz der ASCII Codes
berechnet. */
querAutos = make([]byte, input[2] - firstChar + 1)
// teilt den Text in Zeilen auf und iteriert über die Zeilen ab Zeile 3
for _, line := range strings.Split(input, "\n")[2:] {
// auf Unix Systemen enden die Textdatei auf einem newline Zeichen. Deshalb hat unsere letzte "Zeile" die Länge 0 und wird übersprungen.
if len(line) == 0 {
continue
}
// Die Position des des quer stehenden Autos beginnt ab dem 3. Zeichen (Index 2) bis zum Ende der Zeile.
i, err := strconv.Atoi(line[2:])
throw(err)
// Jedes quer stehende Auto blockiert zwei Parkplätze. Deshalb belegt es auch zwei Plätze in unserer Slice.
querAutos[i], querAutos[i + 1] = line[0], line[0]
}
for i := range querAutos {
var currentMoves []movedCar
var carLeastSteps uint32 = math.MaxUint32
for _, direction := range []int{-1, 1} {
var currentMoves []movedCar // enthält die Verschiebungen der Autos in die Richtung in der weniger Autos verschoben werden müssen
var carLeastSteps uint32
for _, direction := range []int{-1, 1} { // -1 steht für links und 1 für rechts
movedCars, steps, success := move(i, direction, []movedCar{}, 0, 0)
/* Wenn das Verschieben der Autos in der jeweiligen Richtung erfolgreich ist und noch keine
Verschiebungen abgespeichert wurden, d. h. gerade die Verschiebungen für links berechnet
wurden oder das Verschieben nach links nicht erfolgreich war, da das Ende das Parkplatzes
erreicht wurde, dann werden die Verschiebungen abgespeichert.
Sollten allerdings bereits Verschiebungen für links vorhanden sein, wird das Verschieben nach
rechts bevorzugt, wenn weniger Autos verschoben werden mussten oder die Autos weniger Plätze
verschoben werden mussten. */
if success && (currentMoves == nil || len(movedCars) < len(currentMoves) || len(movedCars) == len(currentMoves) && steps < carLeastSteps) {
currentMoves = movedCars
carLeastSteps = steps
}
}
// sortiert die verschoben Autos alphabetisch
sort.Slice(currentMoves, func(i, j int) bool {
return currentMoves[i].id < currentMoves[j].id
})
fmt.Printf("%s: ", string(firstChar + byte(i)))
fmt.Printf("%s: ", string(firstChar + byte(i))) // gibt den Buchstaben für das jeweilige Auto auf den normalen Parkplatz aus.
for j, car := range currentMoves {
if(j != 0) {
fmt.Print(", ")
}
// gibt aus welches Auto wie viele Plätze in welche Richtung verschoben wurde.
fmt.Printf("%s %d ", string(car.id), car.steps)
if car.direction == 1 {
fmt.Print("rechts")
@ -63,34 +85,52 @@ func main() {
}
}
// Funktion um im Falle eines Fehlers, den Fehler auszugeben und das Programm zu beenden.
func throw(err error) {
if err != nil {
panic(err)
}
}
// Funktion zur Berechung der Autos, die für einen Parkplatz verschoben werden müssen.
func move(i, direction int, movedCars []movedCar, lastMoved byte, totalSteps uint32) ([]movedCar, uint32, bool) {
querAuto := querAutos[i]
/* Wenn querAuto gleich 0 ist, ist kein Auto vor dem Parkplatz.
Wenn es das gleiche Auto ist wie das zuletzt verschobene, ist auch das Verschieben beendet,
da dieses Auto bereits ausreichend verschoben wurde. */
if querAuto == 0 || querAuto == lastMoved {
return movedCars, totalSteps, true
}
/* Wenn neben unserem Auto in der jeweiligen Richtung kein Parkplatz mehr ist,
dann können auch keine Autos in diese Richtung verschoben werden. */
if outOfBounds(querAutos, i + direction) {
return movedCars, totalSteps, false
}
var steps int
/* Wenn sich eins nach der Verschiebungsrichtung auch unserer quer parkendes Auto befindet,
muss es nur um einen Platz verschoben werden, ansonsten um zwei. */
if querAutos[i + direction] == querAuto {
steps = 1
} else {
steps = 2
}
endCar := i + direction * 2
endCar := i + direction * 2 // ist das Ende des verschobenen Autos, das realtiv zur verschobenen Richtung, vorne ist.
/* müsste das Auto ausserhalb des Parkplatzes geschoben werden,
damit unser normale Parkplatz frei wird, ist das Verschieben in diese Richtung nicht möglich. */
if outOfBounds(querAutos, endCar) {
return movedCars, totalSteps, false
}
// fügt das gerade verschobene Auto der Slice mit den verschobenen Autos hinzu.
movedCars = append(movedCars, movedCar{querAuto, steps, direction})
/* ruft die Funktion recursive auf, mit dem Index des Parkplatzes an dem
noch ein quer stehendes Auto stehen könnte, das verschoben werden müsste. */
return move(endCar, direction, movedCars, querAuto, totalSteps + uint32(steps))
}
// Funktion um zu überprüfen, ob ein Index innerhalb einer Slice liegt.
func outOfBounds(slice []byte, i int) bool {
return i < 0 || i >= len(slice)
}

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1
a2-Vollgeladen/lib/advanced_C_standard_library Submodule

Submodule a2-Vollgeladen/lib/advanced_C_standard_library added at a83de1b97b

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#include <stdio.h>
#include <acl/file.h>
#include <stdlib.h>
#include <stdint.h>
#include <inttypes.h>
#define panicio {\
perror(*filepath);\
return 1;\
}
#define getNumber strtol(nextnumber + 1, &nextnumber, 10)
struct hotel {
uint_least16_t minutes;
uint_least8_t rating;
};
int compareReverse(const void *a, const void *b) {
return (uint_least8_t*)a - (uint_least8_t*)b;
}
int main(int argc, char *argv[]) {
for(char **filepath = argv + 1; filepath - argv < argc; ++filepath) {
printf("%s:\n", *filepath);
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struct hotel *hotels;
uint_least8_t *ratings;
{
char *inputText;
{
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char *nextnumber;
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for(uint_least16_t i = 0; i < numberHotels; ++i) {
hotels[i].minutes = getNumber;
ratings[i] = 10 * getNumber;
ratings[i] += getNumber;
hotels[i].rating = ratings[i];
}
}
free(inputText);
}
qsort(ratings, numberHotels, sizeof *ratings, compareReverse);
{
struct hotel hotelRoute[4];
uint_least8_t stoppedHotels;
{
uint_least8_t *rating = ratings;
do {
uint_least16_t lastHotelMinutes = 0;
struct hotel *possibleStop = NULL;
stoppedHotels = 0;
for(struct hotel *currentHotel = hotels; currentHotel - hotels < numberHotels; ++currentHotel) {
if(currentHotel->minutes - lastHotelMinutes > 360 && possibleStop != NULL) {
if(stoppedHotels >= 4) break;
hotelRoute[stoppedHotels] = *possibleStop;
lastHotelMinutes = possibleStop->minutes;
currentHotel = possibleStop;
++stoppedHotels;
}
if(currentHotel->rating >= *rating) possibleStop = currentHotel;
}
++rating;
} while(totalMinutes - hotelRoute[stoppedHotels - 1].minutes > 360);
}
for(struct hotel *hotelPrint = hotelRoute; hotelPrint - hotelRoute < stoppedHotels; ++hotelPrint) {
printf("Hotel: %" PRIuLEAST16 " m, rating: %" PRIuLEAST8 "\n", hotelPrint->minutes, hotelPrint->rating);
}
}
free(hotels);
}
}