UGC NET CSE | December 2006 | Part 2 | Question: 11

Question

When a function is recursively called, all automatic variables :

• A. are initialized during each execution of the function

• B. are retained from the last execution

• C. are maintained in a stack

• D. are ignored

Comments

https://gateoverflow.in/49322/when-function-recursively-called-all-automatic-variables

Answer 1

void seq(int num){

     if(num<1)

          return;

     int a = num; // Automatic Variable.

     printf("%d, ", a);     

     seq(num-1);

}

seq(5);

O/P: 5, 4, 3, 2, 1

Here automatic variable "a" is initialized 5 times. Once for each call to seq() with non zero positive number as an argument.