二分查找

#include<stdio.h>

int bseek(int key) {
        int array[10] = {1,2,3,4,5,6,7,8,9,10};
        int low = 0;
        int high = (sizeof(array) / 4) - 1;
        int mid = 0;
        int ret = -1;

        while(low <= high) {
                mid = (low + high) / 2;
                if (key == array[mid]) {
                        ret = mid;
                        break;
                } else if (key < array[mid]) {
                        high = mid - 1;
                } else if (key > array[mid]) {
                        low = mid + 1;
                }
        }

        return ret;
}


void main(int argc, char* argv[])
{
        printf("key[0]:%d\n", bseek(0));
        printf("key[1]:%d\n", bseek(1));
        printf("key[2]:%d\n", bseek(2));
        printf("key[3]:%d\n", bseek(3));
        printf("key[4]:%d\n", bseek(4));
        printf("key[5]:%d\n", bseek(5));
        printf("key[6]:%d\n", bseek(6));
        printf("key[7]:%d\n", bseek(7));
        printf("key[8]:%d\n", bseek(8));
        printf("key[9]:%d\n", bseek(9));
        printf("key[10]:%d\n", bseek(10));
        printf("key[11]:%d\n", bseek(11));
}