C Programming Code Examples
C > Sorting Searching Code Examples
Binary search [int array]
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/* Binary search [int array] */
#include <stdio.h>
#define TRUE 0
#define FALSE 1
int main(void) {
int array[10] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
int left = 0;
int right = 10;
int middle = 0;
int number = 0;
int bsearch = FALSE;
int i = 0;
printf("ARRAY: ");
for(i = 1; i <= 10; i++)
printf("[%d] ", i);
printf("\nSearch for Number: ");
scanf("%d", &number);
while(bsearch == FALSE && left <= right) {
middle = (left + right) / 2;
if(number == array[middle]) {
bsearch = TRUE;
printf("** Number Found **\n");
} else {
if(number < array[middle]) right = middle - 1;
if(number > array[middle]) left = middle + 1;
}
}
if(bsearch == FALSE)
printf("-- Number Not found --\n");
return 0;
}
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