template<typename T>T lapy2(T *x, T *y)# LAPY2 returns sqrt(x2+y2) Purpose: LAPY2 returns sqrt(x**2+y**2), taking care not to cause unnecessary overflow. Parameters: X – [in] X is REAL Y – [in] Y is REAL X and Y specify the values x and y. Returns: T Template based return value of the function.