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Pertemuan 21 Merge Sort

Pertemuan 21 Merge Sort. Matakuliah : T0456 ~ Algoritma dan Metode Object Oriented Programming Tahun : 2005 Versi : 5. Learning Outcomes. Pada akhir pertemuan ini, diharapkan: Mahasiswa dapat Menjelaskan kembali algoritma merge sort. Outline Materi. Algoritma Merge Sort

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Pertemuan 21 Merge Sort

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  1. Pertemuan 21Merge Sort Matakuliah : T0456 ~ Algoritma dan Metode Object Oriented Programming Tahun : 2005 Versi : 5

  2. Learning Outcomes Pada akhir pertemuan ini, diharapkan: Mahasiswa dapat Menjelaskan kembali algoritma merge sort

  3. Outline Materi • Algoritma Merge Sort • Penerapan Merge Sort

  4. Sorting Sorting merupakan proses mengurutkan data sesuai aturan tertentu: Ascending: dari terkecil sampai terbesar Descending: dari terbesar sampai terkecil Tujuan sorting adalah untuk mempercepat proses pencarian (searching) data

  5. Sorting Teknik pengurutan sederhana: Bubble sort Selection sort Insertion sort Teknik pengurutan lanjut: Quick sort Merge sort

  6. Merge sort Pada tahap awal, semua data dibagi menjadi bagian/kelompok data terkecil. Kemudian tiap dua data digabungkan menjadi 1 kelompok data gabungan. Penggabungan data diteruskan sampai semua data terintegrasi menjadi satu

  7. Merge sort (Putaran 1) [5] [6] [7] [8] [9] [0] [1] [2] [3] [4] 22 51 52 12 14 40 9 38 69 18 22 51 52 12 14 40 9 38 69 18 Gabung Gabung Gabung Gabung Gabung 22 9 12 52 14 69 51 38 40 18

  8. Merge sort (Putaran 2) 22 9 12 52 14 69 51 38 40 18 Gabung Gabung 18 22 12 40 14 69 51 38 52 9

  9. Merge sort (Putaran 3) 12 40 18 22 69 14 52 51 38 9 Gabung 9 12 51 52 22 14 18 69 38 40

  10. Merge sort (Putaran 4) 14 38 9 12 51 52 22 18 69 40 Gabung 9 12 38 40 18 52 14 51 69 22

  11. Merge sort 1 Void merge (int *a, int *t, int PKr, int PMid, int PKn){ int i, l1, u1, l2, u2, k; l1 = PKr; u1 = PMid-1; l2 = PMid; U2 = PKn; k = PKr; while ((l1 <= u1) && (l2 <=u2)) t[k++] = (a[l1]<a[l2])?a[l1++:a[l2++]; while (l1<=u1) t[k++] = a[l1++]; while (l2<=u2) t[k++] = a[l2++]; for (i=Pkr; i<=PKn; i++) a[i]=t[i]; }

  12. Merge sort 2 Void m_sort (int *a, int *t, int Kr, int Kn){ int mid; if (Kr < Kn) { mid = (Kr+Kn)/2; m_sort(a, t, Kr, mid); m_sort(a, t, mid+1, Kn); merge(a, t, Kr, mid+1, kn); } }

  13. Merge sort 3 Void mergeSort (int *Dt, int n){ int *temp; temp = (int *) malloc ((n+1)*sizeof(int)); m_sort(Dt, temp, 0, n-1); free(temp); }

  14. Penutup • Untuk dapat Menjelaskan kembali algoritma merge sort, mahasiswa membahas tugas pertemuan 21 no 1, 2, dan 3. (diskusikan dalam kelompok)

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