C++ Program which print itself(code on console screen)

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Hey,
Is it possible to write a C++ console program which prints itself without any file(i.e with .exe only, it prints its own C++ code)?

Posted 4-Apr-13 6:55am

saad_lah

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Monster Maker 4-Apr-13 13:19pm

Without use of any file?

You mean the program should not use file handling??

Sergey Alexandrovich Kryukov 4-Apr-13 15:14pm

Of course. This is a very popular problem related to computability...
Not too hard to solve, by the way, in any non-trivial (in certain sense) language...
—SA

saad_lah 4-Apr-13 14:30pm

Yes, a program which doesnot uses a file opening to print itself, but print itself with an .exe only

Sergey Alexandrovich Kryukov 4-Apr-13 15:15pm

Why didn't you try it by yourself? Good and not very difficult exercise.
—SA

saad_lah 4-Apr-13 15:34pm

Got an idea, i am trying to make it by myself. :)

Sergey Alexandrovich Kryukov 4-Apr-13 15:38pm

Great.
—SA

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Thomas Daniels · Accepted Answer · 2013-04-04T07:04:00

Solution 1

Hi,

I think you mean a Quine:
http://en.wikipedia.org/wiki/Quine_%28computing%29[^]
http://www.madore.org/~david/computers/quine.html[^]

Posted 4-Apr-13 7:04am

Thomas Daniels

Comments

José Amílcar Casimiro 4-Apr-13 13:15pm

5+

Thomas Daniels 4-Apr-13 13:17pm

Thank you!

Shmuel Zang 4-Apr-13 13:21pm

5'ed.

Thomas Daniels 4-Apr-13 13:23pm

Thank you!

enhzflep 4-Apr-13 13:43pm

+5 for recalling the off-beat name they have.
I wrote one once that would output the source of a pdf-creation class to a pdf. (had trouble escaping the c++ comments for display in a pdf, fwiw)
For some reason, Quines remind me of sitting in the hairdressers looking into the seemingly endless mirror within a mirror within a mirror etc, etc image that the mirrors opposite one another create.

Thomas Daniels 5-Apr-13 3:27am

Thank you!

nv3 4-Apr-13 14:25pm

+5 for the good guessing of what OP was actually referring to.

Thomas Daniels 5-Apr-13 3:27am

Thank you!

saad_lah 4-Apr-13 14:31pm

Thanx for sharing your information about quine, but i am still unable to understand how can i write a code which prints itself when i run its .exe without any file handling?

[no name] 4-Apr-13 14:42pm

What do you mean? The second article that ProgramFOX linked gives you code that demonstrates the principle.

Sergey Alexandrovich Kryukov 4-Apr-13 15:13pm

5ed.
—SA

Thomas Daniels 5-Apr-13 3:27am

Thank you!

saad_lah 4-Apr-13 15:35pm

Yeah, i have got an idea, I will post the code as soon as I write it. :)