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C Program to Read an Array and Search for an Element

C Program to Read an Array and Search for an Element

    /* C program accept an array of N elements and a key to search. If the search is successful, it displays "Successful Search". Otherwise, a message "UNSUCCESSFUL SEARCH" is displayed.    */

    #include <stdio.h>

    void main()

    {

        int array[20];

        int j, low, mid, high, key, size;

        printf("Enter the size of an array\n");

        scanf("%d", &size);

        printf("Enter the array elements\n");

        for (j = 0; j < size; j++)

        {

            scanf("%d", &array[j]);

        }

        printf("Enter the key\n");

        scanf("%d", &key);

        /*  search begins */

        low = 0;

        high = (size - 1);

        while (low <= high)

        {

            mid = (low + high) / 2;

            if (key == array[mid])

            {

                printf("Successful Search\n");

                return;

            }

            if (key < array[mid])

                high = mid - 1;

            else

                low = mid + 1;

        }

        printf("Unsuccessful Search\n");

    }

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