strlen function using recursion in c

Question

I\'m kida new to the recursion subject and i\'ve been trying to write the \"strlen\" function using recurion, thats what i tried:

int strlen ( char str[], int i         


        

Answer 1

Your problem starts here:

i++

This is called a postfix. Just use ++i or i + 1

Postfix sends the value and just then increments the variable. It's like writing this:

return strlen(str,i);
i = i + 1;

You have to use Prefix, which increments the variable and then sends the value. A prefix (++i) will act like that:

i = i + 1;
return strlen(str,i);

Or just send the value without changing the variable:

return strlen(str, i + 1);

Which, in my opinion, is the simplest way to do that.