n INTEGER. Specifies the number of elements in vector x. x REAL for sasum DOUBLE PRECISION for dasum COMPLEX for scasum DOUBLE COMPLEX for dzasum Array, DIMENSION at least (1 + (n-1)*abs(incx)). incx INTEGER. Specifies the increment for indexing vector x.
why do you use &n,&inc where, according to the doc, they should be integers? Is this some special calling convention?