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Source Code
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#include <stdio.h>
#include <conio.h>
#define size 100
void merge(int a[], int, int, int);
void merge_sort(int a[], int, int);
void main() {
int arr[size], i, n;
printf("\n Enter the number of elements in the array : ");
scanf("%d", & n);
printf("\n Enter the elements of the array: ");
for (i = 0; i < n; i++) {
scanf("%d", & arr[i]);
}
merge_sort(arr, 0, n - 1);
printf("\n The sorted array is: \n");
for (i = 0; i < n; i++)
printf(" %d\t", arr[i]);
getch();
}
void merge(int arr[], int beg, int mid, int end) {
int i = beg, j = mid + 1, index = beg, temp[size], k;
while ((i <= mid) && (j <= end)) {
if (arr[i] < arr[j]) {
temp[index] = arr[i];
i++;
} else {
temp[index] = arr[j];
j++;
}
index++;
}
if (i > mid) {
while (j <= end) {
temp[index] = arr[j];
j++;
index++;
}
} else {
while (i <= mid) {
temp[index] = arr[i];
i++;
index++;
}
}
for (k = beg; k < index; k++)
arr[k] = temp[k];
}
void merge_sort(int arr[], int beg, int end) {
int mid;
if (beg < end) {
mid = (beg + end) / 2;
merge_sort(arr, beg, mid);
merge_sort(arr, mid + 1, end);
merge(arr, beg, mid, end);
}
}
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