Does call by reference actually exist in c

Replies

• 

  Anoop Kumar

  When ever you pass a variable to function in arguments, it's pass by reference.
  When you use pointers its pass by reference, as pointer directly points to original address.
  

   Pass by value
   
  void foo(int j) {
    j = 0;  /*  modifies the copy of the argument received by the function  */
  }
   
  int main(void) {
    int k=10;
    foo(k);
    /*  k still equals 10  */
  }
   
  pass by refence.
   
  If you do want a function to modify its argument you can obtain the desired effect using pointer arguments instead:
   
       
   
  void foo(int *j) {
    *j = 0;
  }
   
  int main(void) {
    int k=10;
    foo(&k);
    /*  k now equals 0  */
  }
  

  #-Link-Snipped-#:
• 

  rahul69

  Arrays are always passed by reference, regardless of C or C++. In C++, pass by reference takes place by use of '&' and in C, the same reference is done using pointers😀
• 

  Vishal Sharma

  actually, while passing array you don't even need to write '&'
• 

  Ankita Katdare

  That is a good question. I want to know, where did you get
  

  violation of the fact that 'all function calls in c are by value only'

  that from? Is it mentioned in some book?