C/C++ program that prints its own source code as its output
Wikipedia says it's called a quine and someone gave the code below: char*s="char*s=%c%s%c;main(){printf(s,34,s,34);}";main(){printf(s,34,s,34);} But, obviously you have to add #include <stdio.h> //corrected from #include <stdlib.h> so that the printf() could work. Literally, since the above program did not print #include <stdio.h> , it is not a solution (?) I am confused about the literal requirement of "print its own source code", and any purpose of this kind of problems, especially at interviews. The trick here is that most compilers will compile without requiring you to include stdio.h .