Reading and writing combinations
The library provides functions for reading and writing combinations to a
file as binary data or formatted text.
- Function: int gsl_combination_fwrite (FILE * stream, const gsl_combination * c)
-
This function writes the elements of the combination c to the
stream stream in binary format. The function returns
GSL_EFAILED
if there was a problem writing to the file. Since the
data is written in the native binary format it may not be portable
between different architectures.
- Function: int gsl_combination_fread (FILE * stream, gsl_combination * c)
-
This function reads into the combination c from the open stream
stream in binary format. The combination c must be
preallocated with correct values of n and k since the
function uses the size of c to determine how many bytes to read.
The function returns
GSL_EFAILED
if there was a problem reading
from the file. The data is assumed to have been written in the native
binary format on the same architecture.
- Function: int gsl_combination_fprintf (FILE * stream, const gsl_combination * c, const char *format)
-
This function writes the elements of the combination c
line-by-line to the stream stream using the format specifier
format, which should be suitable for a type of size_t. On a
GNU system the type modifier
Z
represents size_t
, so
"%Zu\n"
is a suitable format. The function returns
GSL_EFAILED
if there was a problem writing to the file.
- Function: int gsl_combination_fscanf (FILE * stream, gsl_combination * c)
-
This function reads formatted data from the stream stream into the
combination c. The combination c must be preallocated with
correct values of n and k since the function uses the size of c to
determine how many numbers to read. The function returns
GSL_EFAILED
if there was a problem reading from the file.