Yes, it's called quine. Search for it, you'll find a lot about it :)

It's an interesting problem, and depending on exactly what you want to do, there may be various approaches. For example, this is the smallest quine I can think of in C (suppose the source file is called main.c):

#include

int main() {

system("cat main.c");

return 0;

}

If using Windows, you must replace "cat" with "type".

Oh the fun to have in the morning!

I deem it cheating to use system and then call it a quine in C. You will have to go a little further to make it C and C only:

#include

#include

#include

#include

#include

#include

void main(int argc, char** argv) {

int fd;

int l = strlen(argv[0]);

char f[l+3];

char c = '\0';

strcpy(strcpy((char*)f, argv[0]) + l ,".c");

fd = open(f, O_RDONLY);

while(0 < read(fd,&c,1))

write(1,&c,1);

close(fd);

}

Yes, of course it is cheating if you follow quine rules, but I am not sure the OP is concerned with those rules. I thought he only wanted to print out his source code somehow.

But it becomes interesting if you try to avoid cheating to the max. For example one could call it cheating, what I did, for I actually guessed the name of the file. Well, I left one obvious cheat in mine above code and like to de-cheat it a little more:

#include

#include

#include

#include

void main(int argc, char** argv) {

int fd;

char c;

fd = open(__FILE__, O_RDONLY);

while(0 < read(fd,&c,1))

write(1,&c,1);

close(fd);

}

have fun.

I think it is even more interesting if one avoids accesing the source file itself. After all, one could simply emulate the cat or type commands. On the other hand, while quines are (IMHO) of purely academic interest, I find programs which are capable of generating the source of another program quite useful.

#include

#include

main()

{

printf("Hello world");

getch();

return 0;

}

Probably you are trying to write a program which prints itself. these applications are program specific. what you can do is write the program to read a file, the file name should be the same name of the program..