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+8 votes
617 views

Consider the following recursive C function that takes two arguments.

unsigned int foo(unsigned int n, unsigned int r) {
    if (n>0) return ((n%r) + foo(n/r, r));
    else return 0;
}

What is the return value of the function $\text{foo}$ when it is called as $\text{foo(513, 2)}$?

  1. $9$
  2. $8$
  3. $5$
  4. $2$
asked in Algorithms by Veteran (106k points)
edited by | 617 views

2 Answers

+13 votes
Best answer
The function returns the sum of digits in a binary representation of the given number

so $1+0+0+0+0+0+0+0+0+1 = 2$
answered by Boss (7.6k points)
edited by
+6 votes

Final return value is 2 So option d

answered by Veteran (39.8k points)


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