printf can be used as a variable . But once we declare a variable printf
standard Library function "printf" can not be recongnized by the compiler within the scope of the variable (reason :local symbol might be having higher precedence ).
If at all library func is used compiler wil throw the error saying- " called object is not a function."

For eg : below is an error free C program :

#include <stdio.h>
int main()

{
int printf;
printf 10;
/* printf("n My Number d" num);*/ /* Activating this line causes an error */
Display( printf);
return 1;
}

Display(int num)
{
printf("n My Number d" num);
}

Note : But in programming it is not recommended to use the sandard symbols.



-Jayalakshmi Kaja

We can use printf as a variable and it is compiling GCC compiler

This is my program which is having runtime and compiled successfully without any
warning

#include<stdio.h>



int main( )

{

char printf 'a'; /*for printing use other than printf function*/

putchar(printf);

return o;

}