73 lines
1.8 KiB
C
73 lines
1.8 KiB
C
// Heap Sort in C
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#include<stdio.h>
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#include<conio.h>
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void main()
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{
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int heap[10], no, i, j, c, root, temp;
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printf("\n Enter no of elements :");
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scanf("%d", &no);
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printf("\n Enter the nos : ");
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for (i = 0; i < no; i++)
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scanf("%d", &heap[i]);
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for (i = 1; i < no; i++)
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{
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c = i;
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do
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{
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root = (c - 1) / 2;
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if (heap[root] < heap[c]) /* to create MAX heap array */
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{
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temp = heap[root];
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heap[root] = heap[c];
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heap[c] = temp;
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}
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c = root;
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} while (c != 0);
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}
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printf("\n Heap array : ");
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for (i = 0; i < no; i++)
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printf("%d\t ", heap[i]);
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for (j = no - 1; j >= 0; j--)
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{
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temp = heap[0];
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heap[0] = heap[j]; /* swap max element with rightmost leaf element */
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heap[j] = temp;
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root = 0;
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do
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{
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c = 2 * root + 1; /* left node of root element */
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if ((heap[c] < heap[c + 1]) && c < j-1)
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c++;
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if (heap[root]<heap[c] && c<j) /* again rearrange to max heap array */
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{
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temp = heap[root];
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heap[root] = heap[c];
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heap[c] = temp;
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}
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root = c;
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} while (c < j);
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}
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printf("\n The sorted array is : ");
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for (i = 0; i < no; i++)
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printf("\t %d", heap[i]);
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printf("\n Time Complexity : \n Best case = Avg case = Worst case = O(n logn) \n");
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getch();
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}
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/* Test Case:-
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Enter no of elements :5
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Enter the nos:
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10
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23
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2
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1
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90
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Heap array : 90 23 2 1 10
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The sorted array is : 1 2 10 23 90
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Time Complexity:
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Best case = Avg case = Worst case = O(n logn) */
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