Merge Sort in C - Merge Sort using C Program
Learn C - C tutorial - merge sort using c program - C examples - C programs
Merge Sort using C Program
- Merge sort is used for sorting numbers, structure, files.
- Merge sort first divides the array into two halves and then combines them in a sorted manner.
Sample Code
#include <stdio.h>
#define max 7
int a[11] = {10,14,19,26,33,35,44,0};
int b[10];
void merging(int low, int mid, int high)
{
int l1, l2, i;
for(l1 = low, l2 = mid + 1, i = low; l1 <= mid && l2 <= high; i++)
{
if(a[l1] <= a[l2])
b[i] = a[l1++];
else
b[i] = a[l2++];
}
while(l1 <= mid)
b[i++] = a[l1++];
while(l2 <= high)
b[i++] = a[l2++];
for(i=low; i <=high; i++)
a[i] = b[i];
}
void sort(int low, int high)
{
int mid;
if(low < high)
{
mid = (low + high) / 2;
sort(low, mid);
sort(mid+1, high);
merging(low, mid, high);
}
Else
{
return;
}
}
int main()
{
int i;
printf("List before sorting\n");
for(i = 0; i <= max; i++)
printf("%d ", a[i]);
sort(0, max);
printf("\nList after sorting\n");
for(i = 0; i <= max; i++)
printf("%d ", a[i]);
}
Output
List before sorting
10 14 19 26 33 35 44 0
List after sorting
0 10 14 19 26 33 35 44