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C Program - Source Code Generator
Posted Date: 24 Mar 2008 Resource Type: Articles/Knowledge Sharing Category: Computer & Technology
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Posted By: Arun Jadhav Member Level: Diamond
Rating:  Points: 1
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Many times the question asked in the interviews to write a program which creates it's source code as it's output. I have written the program please check it out.
Program:
#include"stdio.h"
#include"conio.h"
char *s="#include%c#include%cchar *s=%c%s%c;%cvoid main()%c{%cclrscr();%cprintf(s,10,10,34,s,34,10,10,10,10,10,10);%cgetch();%c}";
void main()
{
clrscr();
printf(s,10,10,34,s,34,10,10,10,10,10,10);
getch();
}
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Responses
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| Author: Arun Jadhav 26 Mar 2008 | Member Level: Diamond Points : 3 | Simple form of above program can be written as:
#include"stdio.h"
#include"conio.h"
char *s="char *s=%c%s%c;%cmain(){printf(s,34,s,34,10);getch();}";
main(){printf(s,34,s,34,10);getch();}
Regards
Arun Jadhav
| | Author: Deepu 27 Mar 2008 | Member Level: Diamond Points : 5 | Hi Mr.Arun,
First of all congrats for finding out such an excellent programm.I did'nt checked it.But i will definitely try it out.What i want to know is
Can we write the same code for any other program for which we want to print the source code?I didnt meant the same code .I meant placing the code with %c's as above.
But where to place those %c's in the code inorder to get the source code as its output.
Please give me a reply,
With regards,
-Deepu
| | Author: Arun Jadhav 07 May 2008 | Member Level: Diamond Points : 2 | Hi Deepu,
Thank you for your interest in my program. I am giving the working of program. If you know this you will know where to use
%c.
Program:
#include"stdio.h"
#include"conio.h"
char *s="char *s=%c%s%c;%cmain(){printf(s,34,s,34,10);getch();}";
main(){printf(s,34,s,34,10);getch();}
Explanation:
I have written printf(s,34,s,34,10);
This can be wriiten as
printf("char *s=%c%s%c;%cmain(){printf(s,34,s,34,10);getch();}",34,s,34,10);
where 34 is the ASCII code for " and 10 is the ASCII code for \n character
So according to your program use %c for new line, printing " etc.
If you have any doubts then please reply.
Regards
Arun Jadhav
| | Author: Deepu 12 May 2008 | Member Level: Diamond Points : 2 | Hi Arun,
thanks for your concern and sending me reply for my doubt.you description is very nice and quite understandable.Once again you.
With regards,
Deepu.
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