How do you write a program which produces its own source code as its output in c language?

 #include<stdio.h>  
 int main()  
 {  
   FILE *fp;  
   char c;  
   fp = fopen(__FILE__,"r");  
   do  
 {  
      c= getc(fp);  
      putchar(c);  
   }  
   while(c!=EOF);  
   fclose(fp);  
   return 0;  
 }  
 Output:  
 #include<stdio.h>  
 int main()  
 {  
   FILE *fp;  
   char c;  
   fp = fopen(__FILE__,"r");  
   do  
 {  
      c= getc(fp);  
      putchar(c);  
   }  
   while(c!=EOF);  
   fclose(fp);  
   return 0;  
 }