Function name in c

Feature of function name:


1. Function name is constant pointer.


Example:


What will be output of following program?


#include<stdio.h>

void special();
int main(){

   special++;

   special();
   return 0;
}
void special(){

   printf("HI");
}


Output: Error, Lvalued required.


Explanation: Function name is constant pointer. So you cannot increment function special.


2. Function name gives the address where it has defined.


#include<stdio.h>
int main(){

   int p,q;

   cquestionbank();

   printf("%u",cquestionbank);
   return 0;
}
int cquestionbank(){

   printf("");

   return 0;
}


Output: Address of function


3. We can rename the function name using typedef keyword.