Quicksort

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Code : Tout sélectionner

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int partition (char* arr[], int low, int high) {
    char* pivot = arr[high];
    int i = (low - 1);

    for (int j = low; j <= high- 1; j++) {
        if (strcmp(arr[j], pivot) < 0) {
            i++;
            char* swap = arr[i];
            arr[i] = arr[j];
            arr[j] = swap;
        }
    }
    char* swap = arr[i+1];
    arr[i+1] = arr[high];
    arr[high] = swap;
    return (i + 1);
}

void quickSort(char* arr[], int low, int high) {
    if (low < high) {
        int pi = partition(arr, low, high);
        quickSort(arr, low, pi - 1);
        quickSort(arr, pi + 1, high);
    }
}

int main() {
    char* arr[] = {"banane", "cerise", "abricot", "poire", "orange"};
    int n = sizeof(arr)/sizeof(arr[0]);
    quickSort(arr, 0, n-1);
    for (int i=0; i<n; i++)
        printf("%s\n", arr[i]);
    return 0;
}