我想读取一个文件,修改行并将结果写入另一个文件。
readtofile :- open('inputfile.txt', read, Str), read_file(Str,Lines), close(Str). read_file(Stream) :- at_end_of_stream(Stream). read_file(Stream) :- \+ at_end_of_stream(Stream), read(Stream), modify(Stream,Stream2), write_file(Stream2), read_file(Stream). write_file('outputfile.txt', Phrase) :- open('outputfile.txt', write, Stream), writeln(Stream, Phrase), close(Stream).
答案 0 :(得分:1)
我会写类似
的内容tranform_file :-
open('inputfile.txt', read, I),
open('outputfile.txt', write, O),
transform_lines(I, O),
close(O),
close(I).
transform_lines(I, O) :-
read_line_to_codes(I, L),
( L == end_of_file
-> true
; transform_line(L, T),
format(O, '~s~n', [T]),
transform_lines(I, O)
).
(注意:未经测试)