Cyclesort in C - Sanfoundry

This C Program implements cyclesort. Cycle sort is an in-place, unstable sorting algorithm, a comparison sort that is theoretically optimal in terms of the total number of writes to the original array, unlike any other in-place sorting algorithm. It is based on the idea that the permutation to be sorted can be factored into cycles, which can individually be rotated to give a sorted result.

Here is source code of the C Program to implement cyclesort. The C program is successfully compiled and run on a Linux system. The program output is also shown below.

```
/* 
```
```
 * C Program to Implement Cyclesort 
```
```
 */
```
```
#include <stdio.h>
```
```
 
```
```
#define MAX 8
```
```
 
```
```
void cycle_sort(int *);
```
```
 
```
```
void main()
```
```
{
```
```
    int a[MAX],i;
```
```
 
```

    printf("enter the elements into array :");

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    for (i = 0;i < MAX; i++)
```
```
    {
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```
        scanf("%d", &a[i]);
```
```
    }
```
```
    cycle_sort(a);
```
```
    printf("sorted elements are :\n");
```
```
    for (i = 0;i < MAX; i++)
```
```
    {
```
```
        printf("%d", a[i]);
```
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    }
```
```
}
```
```
 
```

/* sorts elements using cycle sort algorithm */

```
void cycle_sort(int * a)
```
```
{
```
```
    int temp, item, pos, i, j, k;
```
```
 
```
```
    for (i = 0;i < MAX; i++)
```
```
    {
```
```
        item = a[i];
```
```
        pos = i;
```
```
        do
```
```
        {
```
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            k = 0;
```
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            for (j = 0;j < MAX;j++)
```
```
            {
```

                if (pos != j && a[j] < item)

```
                {
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                    k++;
```
```
                }
```
```
            }
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            if (pos != k)
```
```
            {
```

                while (pos != k && item == a[k])

```
                {
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                    k++;
```
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                }
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                temp = a[k];
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                a[k] = item;
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                item = temp;
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                pos = k;
```
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            }
```
```
        }while (pos != i);
```
```
    }
```
```
}
```

$ cc cyclesort.c
$ a.out
enter the elements into array :7 3 2 5 4 8 9 6
sorted elements are :
23456789
$ a.out
enter the elements into array :7 3 2 4 5 4 6 3
sorted elements are :
23344567

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