Exam 6: Functions

The value in a(n) _______ variable persists between function calls.

What is the output of the following program? #include <iostream> using namespace std; void showDub(int); int main() { $\quad$ int x = 2; $\quad$ showDub(x); $\quad$ cout << x << endl; $\quad$ return 0; } void showDub(int num) { $\quad$ cout << (num * 2) << endl; }

A local variable and a global variable may not have the same name within the same program.

In a function header, you must furnish

Which line in the following program contains the prototype for the showDub function? 1 $\quad$ #include <iostream> 2 $\quad$ using namespace std; 3 4 $\quad$ void showDub(int); 5 6 $\quad$ int main() 7 $\quad$ { 8 $\quad$$\quad$ int x = 2; 9 10 $\quad$$\quad$ showDub(x); 11 $\quad$$\quad$ cout << x << endl; 12 $\quad$$\quad$ return 0; 13 $\quad$ } 14 15 void showDub(int num) 16 { 17 cout << (num * 2) << endl; 18 }

Look at the following function prototype. int myFunction(double); What is the data type of the funtion's return value?

A(n) _________ is information that is passed to a function, and a(n) _________ is information that is received by a function.

Which of the following statements about global variables is true?

A static variable that is defined within a function is initialized only once, the first time the function is called.