# NAG CL Interfaceg13bxc (options_​init)

## 1Purpose

g13bxc initializes the structure options. This structure is used by some functions in Chapter G13. This function must be called before any direct assignments are made to members of the options structure.

## 2Specification

 #include
 void g13bxc (Nag_G13_Opt *options)
The function may be called by the names: g13bxc or nag_tsa_options_init.

## 3Description

A number of optional parameters are applicable to several functions in Chapter G13. These arguments are set by means of a structure of type Nag_G13_Opt. This initialization function sets the members of the structure to null values indicating that the default values should be used for these arguments. If argument values other than the default values are required, they must be assigned to the appropriate members of the options structure in the calling program.
This assignment of optional parameters values to the options structure must be preceded by a call to g13bxc.

None.

## 5Arguments

1: $\mathbf{options}$Nag_G13_Opt * Output
On exit: the initialized option structure.

None.

Not applicable.

## 8Parallelism and Performance

g13bxc is not threaded in any implementation.

None.

## 10Example

See g13bec and g13bjc for examples of how g13bxc is used.