Function SCIPwriteParams 

pub unsafe extern "C" fn SCIPwriteParams(
    scip: *mut SCIP,
    filename: *const c_char,
    comments: c_uint,
    onlychanged: c_uint,
) -> SCIP_RETCODE

writes all parameters in the parameter set to a file

@return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref SCIP_Retcode “SCIP_RETCODE” for a complete list of error codes.