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#include<stdio.h>
#include<stdlib.h>
#include<time.h>
#define SIZE 10
void swap(int * a, int * b)
{
int tmp = *a;
*a = *b;
*b = tmp;
}
void generateRandom(int * arr, int n)
{
time_t sr;
srand(sr);
for(int i = 0; i < n; i++)
arr[i] = rand() % 100;
}
int partition(int * arr, int low, int high)
{
int i,j;
for (i = low, j = low; i < high; i++)
if (arr[i] < arr[high])
{
swap(&arr[i],&arr[j]);
j++;
}
swap(&arr[high],&arr[j]);
return j;
}
void quickSort(int * arr, int low, int high)
{
if (low < high)
{
int pivot = partition(arr,low,high);
quickSort(arr,low, pivot - 1); // sort left
quickSort(arr,pivot + 1, high);
}
}
int main(void)
{
int arr[SIZE];
generateRandom(arr,SIZE);
for(int i = 0; i < SIZE; i++)
printf("%3d",*(arr+i));
putchar('\n');
quickSort(arr,0,SIZE - 1);
for (int i = 0; i < SIZE; i++)
printf("%3d",arr[i]);
putchar('\n');
return 0;
}
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