forked from Mirrors/tinycc
84 lines
1.3 KiB
C
84 lines
1.3 KiB
C
#include <stdio.h>
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int array[16];
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//Swap integer values by array indexes
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void swap(int a, int b)
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{
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int tmp = array[a];
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array[a] = array[b];
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array[b] = tmp;
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}
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//Partition the array into two halves and return the
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//index about which the array is partitioned
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int partition(int left, int right)
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{
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int pivotIndex = left;
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int pivotValue = array[pivotIndex];
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int index = left;
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int i;
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swap(pivotIndex, right);
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for(i = left; i < right; i++)
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{
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if(array[i] < pivotValue)
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{
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swap(i, index);
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index += 1;
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}
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}
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swap(right, index);
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return index;
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}
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//Quicksort the array
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void quicksort(int left, int right)
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{
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if(left >= right)
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return;
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int index = partition(left, right);
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quicksort(left, index - 1);
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quicksort(index + 1, right);
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}
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int main()
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{
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int i;
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array[0] = 62;
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array[1] = 83;
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array[2] = 4;
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array[3] = 89;
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array[4] = 36;
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array[5] = 21;
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array[6] = 74;
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array[7] = 37;
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array[8] = 65;
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array[9] = 33;
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array[10] = 96;
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array[11] = 38;
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array[12] = 53;
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array[13] = 16;
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array[14] = 74;
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array[15] = 55;
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for (i = 0; i < 16; i++)
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printf("%d ", array[i]);
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printf("\n");
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quicksort(0, 15);
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for (i = 0; i < 16; i++)
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printf("%d ", array[i]);
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printf("\n");
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return 0;
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}
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/* vim: set expandtab ts=4 sw=3 sts=3 tw=80 :*/
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