What will be the output of the following C++ code?
int sum(int a, int b = 10)
{
return a + b;
}
int main()
{
cout << sum(5);
}
Options
-
A.
5
-
B.
10
-
C.
15
-
D.
More than one of the above
-
E.
None of the above
Correct Answer (Detailed Explanation is Below)
C.
15
Detailed Explanation
Answer: (C) 15
The function sum() has a default value of 10 for parameter b.
When the function is called as sum(5), only the first argument is supplied.
Therefore, a = 5 and the default value b = 10 is used.
Hence:
sum(5) = 5 + 10 = 15
