#include<stdio.h>
int linearsearch(int [], int, int);

void main()
 {
    const int arraysize = 10;
    int a[arraysize], searchkey, element;

		for(int x=0; x<arraysize; x++)
			a[x] = 2*x;
	    printf("Array is:\t");
		for(x=0; x<arraysize; x++)
			printf("\t%d",a[x]);
	    printf("\nEnter Integer Search Key: ");
	    scanf("%d", &searchkey);
	    element = linearsearch(a, searchkey, arraysize);
			if(element != -1)
				printf("Found Value at element %d", element);
			else
				printf("Value not found");
 }


 int linearsearch(int array[], int key, int sizeofarray)
 {

	for(int n=0; n<sizeofarray; n++)
		if(array[n] == key)
			return n;
  return -1;
 }