C/Visual C - Búsqueda binaria dentro de array C

int find (int * vector_, int length_, int value_) {

    int low = 0;

    int hight = length_ - 1;

    int half = hight / 2;

    while(low <= hight) {

        if(value_ == vector_[half])

          return half;

        else {

            if(value_ < vector_[half])

              hight = half - 1;

            else

              low = half + 1;

        }

        half = (hight + low) / 2;

    }

    return -1;

}