fwrite_stringT_fwrite_stringFwriteStringFwriteStringfwrite_string (算子名称)

名称

fwrite_stringT_fwrite_stringFwriteStringFwriteStringfwrite_string — Write strings and numbers into a text file.

参数签名

描述

The operator fwrite_stringfwrite_stringFwriteStringFwriteStringFwriteStringfwrite_string writes one or more strings or numbers to the output file defined by the handle FileHandleFileHandleFileHandleFileHandlefileHandlefile_handle. The output file must have been opened with open_fileopen_fileOpenFileOpenFileOpenFileopen_file in text format.

Strings and numbers that are to be written into the file are passed via the input parameter StringStringStringStringstringValstring to the operator fwrite_stringfwrite_stringFwriteStringFwriteStringFwriteStringfwrite_string. The parameter StringStringStringStringstringValstring accepts also tuples where strings and numbers are mixed. All elements of the tuple are written consecutively into the file without blanks or other separators in between. Numbers are converted into a string before they are written.

The operator fwrite_stringfwrite_stringFwriteStringFwriteStringFwriteStringfwrite_string emits a low-level error message, when the string cannot be transcoded without loss of information into the specified file encoding. This can only happen when the file encoding is 'locale_encoding'"locale_encoding""locale_encoding""locale_encoding""locale_encoding""locale_encoding" and the current encoding of the HALCON library is 'utf8'"utf8""utf8""utf8""utf8""utf8" (see set_system(::'filename_encoding','utf8':)set_system("filename_encoding","utf8")SetSystem("filename_encoding","utf8")SetSystem("filename_encoding","utf8")SetSystem("filename_encoding","utf8")set_system("filename_encoding","utf8")).

The call set_system(::'flush_file', <boolean-value>:)set_system("flush_file", <boolean-value>)SetSystem("flush_file", <boolean-value>)SetSystem("flush_file", <boolean-value>)SetSystem("flush_file", <boolean-value>)set_system("flush_file", <boolean-value>) determines whether the output characters are immediately written to the file or not. If the value 'flush_file'"flush_file""flush_file""flush_file""flush_file""flush_file" is set to 'false'"false""false""false""false""false", the characters (especially in case of screen output) show up only after the operator fnew_linefnew_lineFnewLineFnewLineFnewLinefnew_line is called.

运行信息

• Multithreading type: reentrant (runs in parallel with non-exclusive operators).
• Multithreading scope: global (may be called from any thread).
• Processed without parallelization.

参数表

fwrite_string(FileHandle,['text with numbers:',5,' and ',1.0])
* results in the following output:
* 'text with numbers:5 and 1.00000'

   fwrite_string(FileHandle,"text with numbers: ");
   fwrite_string(FileHandle,"5");
   fwrite_string(FileHandle," and ");
   fwrite_string(FileHandle,"1.0");
/* results in the following output:       */
/*    'text with numbers: 5 and 1.00000'   */

/* Tupel Version */
  int  i;
  double d;
  Htuple Tuple;

  create_tuple(&Tuple,4);
  i = 5;
  d = 10.0;
  set_s(Tuple,"text with numbers: ",0);
  set_i(Tuple,i,1);
  set_s(Tuple," and ",2);
  set_d(Tuple,d,3);
  T_fwrite_string(FileHandle,HilfsTuple);

fwrite_string(FileHandle,['text with numbers:',5,' and ',1.0])
* results in the following output:
* 'text with numbers:5 and 1.00000'

fwrite_string(FileHandle,['text with numbers:',5,' and ',1.0])
* results in the following output:
* 'text with numbers:5 and 1.00000'

fwrite_string(FileHandle,['text with numbers:',5,' and ',1.0])
* results in the following output:
* 'text with numbers:5 and 1.00000'

结果

If the writing procedure was carried out successfully, the operator fwrite_stringfwrite_stringFwriteStringFwriteStringFwriteStringfwrite_string returns the value 2 ( H_MSG_TRUE) . Otherwise, an exception is raised. Encoding errors have no influence on the result state.

可能的前置算子

open_fileopen_fileOpenFileOpenFileOpenFileopen_file

可能的后置算子

close_fileclose_fileCloseFileCloseFileCloseFileclose_file

可替代算子

write_stringwrite_stringWriteStringWriteStringWriteStringwrite_string

参考其它

open_fileopen_fileOpenFileOpenFileOpenFileopen_file, close_fileclose_fileCloseFileCloseFileCloseFileclose_file, set_systemset_systemSetSystemSetSystemSetSystemset_system

模块

Foundation