C++实现二分查找算法的代码

C++实现二分查找算法的代码

<<array binary search>>=
template< typename T, typename compare_less >
int array_binary_search(T a[], int low, int high, T target) {
    while (low <= high) {
        int middle = low + (high - low)/2;
        if (compare_less(target, a[middle]))
            high = middle - 1;
        else if (compare_less(a[middle], target))
            low = middle + 1;
        else
            return middle;
    }
    return -1;
}