What will be the output of the following C++ code?
void change(int x)
{
x = 100;
}
int main()
{
int a = 20;
change(a);
cout << a;
}
Options
-
A.
20
-
B.
100
-
D.
More than one of the above
-
E.
None of the above
Correct Answer (Detailed Explanation is Below)
A.
20
Detailed Explanation
Answer: (A) 20
In pass-by-value, the function receives a copy of the argument.
Therefore, the parameter x is a separate copy of a.
Changing x to 100 does not change the original variable a.
Consequently, cout << a prints 20.
