programming-examples/c/Search_Sorting/C Program to accept Sorted Array and do Search using Binary Search.c

/*
 * C program to accept N numbers sorted in ascending order
 * and to search for a given number using binary search.
 * Report success or failure.
 */
#include <stdio.h>

void main()
{
    int array[10];
    int i, j, num, temp, keynum;
    int low, mid, high;
    printf("Enter the value of num \n");
    scanf("%d", &num);
    printf("Enter the elements one by one \n");
    for (i = 0; i < num; i++)
        {
            scanf("%d", &array[i]);
        }
    printf("Input array elements \n");
    for (i = 0; i < num; i++)
        {
            printf("%d\n", array[i]);
        }
    /*  Bubble sorting begins */
    for (i = 0; i < num; i++)
        {
            for (j = 0; j < (num - i - 1); j++)
                {
                    if (array[j] > array[j + 1])
                        {
                            temp = array[j];
                            array[j] = array[j + 1];
                            array[j + 1] = temp;
                        }
                }
        }
    printf("Sorted array is...\n");
    for (i = 0; i < num; i++)
        {
            printf("%d\n", array[i]);
        }
    printf("Enter the element to be searched \n");
    scanf("%d", &keynum);
    /*  Binary searching begins */
    low = 1;
    high = num;
    do
        {
            mid = (low + high) / 2;
            if (keynum < array[mid])
                high = mid - 1;
            else if (keynum > array[mid])
                low = mid + 1;
        }
    while (keynum != array[mid] && low <= high);
    if (keynum == array[mid])
        {
            printf("SEARCH SUCCESSFUL \n");
        }
    else
        {
            printf("SEARCH FAILED \n");
        }
}
/*
*OUTPUT:
Enter the value of num
5
Enter the elements one by one
23
90
56
15
58
Input array elements
23
90
56
15
58
Sorted array is...
15
23
56
58
90
Enter the element to be searched
58
SEARCH SUCCESSFUL

Enter the value of num
4
Enter the elements one by one
1
98
65
45
Input array elements
1
98
65
45
Sorted array is...
1
45
65
98
Enter the element to be searched
6
SEARCH FAILED
*/