Question

1 int f (int n) {
2 return (n < 3) ? n-1 : f(n-1) + f(n-2);
}​

Answer 1

Answer:

3 will be the right ans for the above question

Answer 2

Answer:

If n<3 , the function will return the value of n-1.

Explanation:

• Let the value of n be 2. In this case the function will return n-1 i,e. 2.
• let the value of n be 4.    (n>3) is false so f(n-1)+f(n-2) will execute.

      f(n-1) is f(3), when f(3) will be called it will call f(2) and f(1).

so we can project the scenario like this:

• f(4) will return f(3)+f(2)

• f(3) will return f(2)+ f(1)
• f(2) will return the value 1
• f(1) will return the value 0
• so we can write f(4)=f(3)+f(2)=f(2)+f(1)+f(2)=2f(2)+f(1)=2.1 +0=2+0=2

Hence return statement will return 2 if n=4.