Insertion_sort.c

//INSERTION SORT using C Program
#include <math.h>
#include <stdio.h>

/* Function to sort an array using insertion sort*/

void insertionSort(int arr[], int n)
{
	int i, key, j;
	for (i = 1; i < n; i++) {
		key = arr[i];
		j = i - 1;

		/* Move elements of arr[0..i-1], that are
		greater than key, to one position ahead
		of their current position */
		while (j >= 0 && arr[j] > key) {
			arr[j + 1] = arr[j];
			j = j - 1;
		}
		arr[j + 1] = key;
	}
}
/*Function to Print Array*/

void printArray(int arr[], int n)
{
	int i;
	for (i = 0; i < n; i++)
		printf("%d ", arr[i]);
	printf("\n");
}

/* Driver program to test insertion sort */
int main()
{
	int i, n;
	printf("Enter the number of elements in the array : ");
	scanf("%d",&n);
	int arr[n];
	printf("Enter the elements in the array : ");
	for(i = 0;i<n;i++){
		scanf("%d",&arr[i]);
	}
	printf("Entered array is : ");
	printArray(arr, n);
	printf("\n");
	insertionSort(arr,n);
	printf("Sorted array : ");
	printArray(arr, n);
	return 0;
}