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GATE2011-48

14 votes
4.1k 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 $\text{foo(345, 10)}$?

  1. $345$
  2. $12$
  3. $5$
  4. $3$
in Algorithms
edited by 4.1k views
1
Sum of the digits in the given decimal number 345, 3+4+5 = 12 is the correct option.
0
would the answer have been any different for signed int ?

4 Answers

22 votes
 
Best answer

Red colour represents return values.

Answer is 12.


edited by
12 votes
A) The function returns the sum of digits of the given number.

so 5+4+3 = 12
2 votes

Following recursive calls

0 votes


∴ 5+4+3+0 = 12

0
What would be the reccurance equation for this question?
← Prev. Next →
← Prev. Qn. in Sub. Next Qn. in Sub. →
Answer:

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