program that prints itself, how does it work?

Question

I came across a program that prints itself on this site, i.e. it prints the program code.

The program code is:

#include 
char *program         


        

Answer 1

This can be done using File handling. Save the program with any name and put that name in the open directory in fopen command. Like my program's name is hello.cpp.

This is the following program

#include 
#include 
int main()
{
    FILE *fp;   
    fp=fopen("hello.cpp","r");
    char ch;
    while((ch=fgetc(fp))!=EOF)
    {
       printf("%c",ch);
     }
}