62 lines
1.2 KiB
C
62 lines
1.2 KiB
C
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/*
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* C program accept an array of N elements and a key to search.
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* If the search is successful, it displays "SUCCESSFUL SEARCH".
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* Otherwise, a message "UNSUCCESSFUL SEARCH" is displayed.
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*/
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#include <stdio.h>
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void main()
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{
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int array[20];
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int i, low, mid, high, key, size;
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printf("Enter the size of an array\n");
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scanf("%d", &size);
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printf("Enter the array elements\n");
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for (i = 0; i < size; i++)
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{
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scanf("%d", &array[i]);
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}
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printf("Enter the key\n");
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scanf("%d", &key);
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/* search begins */
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low = 0;
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high = (size - 1);
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while (low <= high)
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{
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mid = (low + high) / 2;
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if (key == array[mid])
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{
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printf("SUCCESSFUL SEARCH\n");
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return;
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}
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if (key < array[mid])
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high = mid - 1;
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else
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low = mid + 1;
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}
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printf("UNSUCCESSFUL SEARCH\n");
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}
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/*
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*OUTPUT:
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Enter the size of an array
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4
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Enter the array elements
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90
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560
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300
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390
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Enter the key
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90
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SUCCESSFUL SEARCH
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Enter the size of an array
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4
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Enter the array elements
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100
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500
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580
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470
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Enter the key
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300
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UNSUCCESSFUL SEARCH
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*/
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