generated from freudenreichan/info2Praktikum-DobleSpiel
67 lines
1.7 KiB
C
67 lines
1.7 KiB
C
#include <stdlib.h>
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#include <stdio.h>
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#include <time.h>
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#include <string.h>
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#include "numbers.h"
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#include "bintree.h"
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//TODO: getDuplicate und createNumbers implementieren
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/* * * Erzeugen eines Arrays mit der vom Nutzer eingegebenen Anzahl an Zufallszahlen.
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* Sicherstellen, dass beim Befüllen keine Duplikate entstehen.
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* Duplizieren eines zufälligen Eintrags im Array.
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* in `getDuplicate()`: Sortieren des Arrays und Erkennen der doppelten Zahl durch Vergleich benachbarter Elemente. */
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// Returns len random numbers between 1 and 2x len in random order which are all different, except for two entries.
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// Returns NULL on errors. Use your implementation of the binary search tree to check for possible duplicates while
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// creating random numbers.
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unsigned int *createNumbers(unsigned int len)
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{
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srand(time(NULL));
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unsigned int* numbers =malloc(sizeof(unsigned int) * len);
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unsigned int numberTemp;
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bool check = false;
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for(int i = 0; i < len; i++){
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while(check == false){
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numberTemp = (rand() % 2*len)+1;
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for(int j = 0; j < i; j++){
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if(numberTemp == numbers[j]){
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check = false;
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break;
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}
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if(j + 1 == i){
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check = true;
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}
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}
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numbers[i] = numberTemp;
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}
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}
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return numbers;
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}
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// Returns only the only number in numbers which is present twice. Returns zero on errors.
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unsigned int getDuplicate(const unsigned int numbers[], unsigned int len)
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{
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unsigned int duplicate;
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unsigned int duplicateId;
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unsigned int duplicatePlace;
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duplicateId = rand() % len;
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duplicate = numbers[duplicateId];
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do{
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duplicatePlace = rand() % len;
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}while(duplicatePlace == duplicateId);
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numbers[duplicatePlace] = duplicate;
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return duplicate;
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} |