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70 lines
1.7 KiB
C#
70 lines
1.7 KiB
C#
/*
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* C# Program to Perform Merge Sort
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*/
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using System;
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using System.Collections.Generic;
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using System.Text;
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namespace prog
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{
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class Program
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{
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static public void mergemethod(int [] numbers, int left, int mid, int right)
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{
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int [] temp = new int[25];
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int i, left_end, num_elements, tmp_pos;
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left_end = (mid - 1);
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tmp_pos = left;
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num_elements = (right - left + 1);
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while ((left <= left_end) && (mid <= right))
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{
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if (numbers[left] <= numbers[mid])
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temp[tmp_pos++] = numbers[left++];
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else
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temp[tmp_pos++] = numbers[mid++];
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}
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while (left <= left_end)
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temp[tmp_pos++] = numbers[left++];
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while (mid <= right)
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temp[tmp_pos++] = numbers[mid++];
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for (i = 0; i < num_elements; i++)
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{
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numbers[right] = temp[right];
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right--;
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}
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}
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static public void sortmethod(int [] numbers, int left, int right)
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{
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int mid;
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if (right > left)
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{
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mid = (right + left) / 2;
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sortmethod(numbers, left, mid);
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sortmethod(numbers, (mid + 1), right);
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mergemethod(numbers, left, (mid+1), right);
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}
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}
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static void Main(string[] args)
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{
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int[] numbers = { 3, 8, 7, 5, 2, 1, 9, 6, 4 };
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int len = 9;
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Console.WriteLine("MergeSort :");
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sortmethod(numbers, 0, len - 1);
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for (int i = 0; i < 9; i++)
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Console.WriteLine(numbers[i]);
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Console.Read();
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}
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}
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}
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/*
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MergeSort :
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1
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2
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3
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4
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5
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6
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7
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8
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9 |