Which Line in the Following Program Contains a Call to the ShowDub

question 41

Multiple Choice

Which line in the following program contains a call to the showDub function?
1 #include <iostream>
2 using namespace std;
3 void showDub(int) ;
4 int main()
5 {
6 $\quad$ int x = 2;
7 $\quad$ showDub(x) ;
8 $\quad$ cout << x << endl;
9 $\quad$ return 0;
10 }
11 void showDub(int num)
12 {
13 $\quad$ cout << (num * 2) << endl;
14 }

• A) line 3
• B) line 4
• C) line 7
• D) line 11

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Definitions:

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The increase in output that arises from an additional unit of input, holding all other inputs constant.