cnfExpch - Export a C array of char to a FORTRAN string.

Description:

Export a C array of char to a FORTRAN string, copying `nchars' characters. No characters, are special so this may be used to export an HDS locator which could contain a null character.

Invocation:

cnfExpch( source_c, dest_f, nchars )

Arguments:

const char *source_c (Given)

A pointer to the input C string

char *dest_f (Returned via pointer)

A pointer to the output FORTRAN string

int nchars (Given)

The number of characters to be copied from source_c to dest_f