how to output results from a c++ program ran in dos to an txt file

Question

here is what my .bat file looks like:

cd C:\cygnus\cygwin-b20\H-i586-cygwin32\bin
g++ -g hello.cpp -o hello -lm
start hello.exe

I need the results of hello.exe written to text file. Can you help me ?

google ["piping"](http://www.lagmonster.org/docs/DOS7/pipes.html). FYI, at one point in computer history, if you didn't know how to do this, you were excommunicated. — SQLMason, Aug 13 '13 at 16:17
This looks like a duplicate of http://stackoverflow.com/questions/574543/writing-all-program-output-to-a-txt-file-in-c — mars, Aug 13 '13 at 16:22
Wow, one moment - you are running something in a cygwin folder and run it from a windows cmd.exe? Could it be that you're kind of missing the purpose of cygwin, or is that intentional? — Hulk, Aug 13 '13 at 16:27

score 1 · Answer 1 · answered Aug 13 '13 at 16:23

1

hello > output.txt 2>&1

will catch both standard output (1) and standard error (2) and send them to output.txt.

A quick Google search on "batch file pipe results to text file" brings you to this page.

answered Aug 13 '13 at 16:23

Maple

A quick read would let you know that this question has been resolved 4 minutes before your answer. – SQLMason Aug 13 '13 at 16:26

score 0 · Answer 2 · answered Aug 13 '13 at 16:19

0

If you are on windows, install Cygwin, then the operation

hello > file.txt

should work (as posted in the comment)

answered Aug 13 '13 at 16:19

Martin

5

-1 for turning someone's comment into your answer. Not because it's wrong... but because it's wrong for you to do that. – SQLMason Aug 13 '13 at 16:19
5

Also, you don't need cygwin to do that, this one of the few things `cmd.exe` is capable of :) – filmor Aug 13 '13 at 16:20
thanks, how do you display the text file on the screen after clicking on the .bat file? this can save me an extra step – Cartright Mellisa Aug 13 '13 at 16:25
on ubuntu its something like cat file.txt (to display it in cmd, if i got you right), I don't know, if that works on windows, but with cygwin it should work – Martin Aug 13 '13 at 16:26
Also, it seems that cygwin is already installed, note the path in the first line ;) – Hulk Aug 13 '13 at 16:28
@ Hulk... yeah, I recognized that too late :( – Martin Aug 13 '13 at 16:29
type file.txt didnt work.. I need that text file to automatically open up when i run the bat file – Cartright Mellisa Aug 13 '13 at 16:30
`start notepad "file.txt"` However, you've just scope creeped your question. – SQLMason Aug 13 '13 at 16:31
Question also asked (and answered) [here](http://stackoverflow.com/questions/6657777/open-text-file-and-program-shortcut-in-windows-batch-file) – Martin Aug 13 '13 at 16:34
@Dan Andrews: I don't see a problem here considering the answer acknowledges the comment. – BoltClock Aug 14 '13 at 09:12
@BoltClock Thanks for letting me know that you don't see a problem with his actions. – SQLMason Aug 14 '13 at 12:39

2 Answers2