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