Print their own source code as output in C.

Print their own source code as output in C. 

1. Open the file you are currently writing using statement fopen(__FILE__,”r”) and assign it to the pointer fp.

2. Scan the every character of the file and store it in the variable ch. Print it using statement putchar(ch).
3. Do step 2 until EOF (end of file).
4. Then close the file and exit.

Example

code:

1. /*

2.  * C Program to Display its own Source Code as its Output

3.  */

4. #include <stdio.h>

6. int main()

7. {

8.     FILE *fp;

9.     char ch;

11.     fp = fopen(__FILE__,"r");

12.     do

13.     {

14.         ch = getc(fp);

15.         putchar(ch);

16.      }

17.      while (ch != EOF);

18.      fclose(fp);

19.      return 0;

20. }

output

Output:
 
/*
 * C Program to display its own source code as its output
 */
#include <stdio.h>
 
int main()
{
    FILE *fp;
    char ch;
 
    fp = fopen(__FILE__,"r");
    do
    {
        ch = getc(fp);
        putchar(ch);
     }
     while (ch != EOF);
     fclose(fp);
     return 0;
}