Question

COSC 112 Test #3 Spring 2019 20. It is not necessary to specify the parameter name in the parameter list of a function prototype even 21. Which of following is not a situation when reference parameters are useful? though there is a default parameter. (True/False) a. When you don't want to have side effects b. When you need to change the actual parameter c. When you need to return more than one value d. When you want to save memory space and time by not copying values to formal parameters 22. A void function does not have a return type, and it is not needed to have a return statement. 23. It is possible to create a static local variable though local variables are usually automatic. 24. It is allowed to create a local variable, num, though there is a global variable num already 25. When you attach & after the dataType in the formal parameter list of a function, the variable (True/False ) (True/False) (True /False ) following that data Type becomes a(n) a. reference parameter d. pointer b. address c. value 26. What is default parameter? Explain it using examples. [4 points) Write function rototypes! You need to write only one line of code. Do not write function definitions.) [9 points a. The function sum that takes four int numbers and returns the sum of them. The third and fourth ons. (Protosypes! You need to write only one line of prototypes for following functions. f 27. Write function number have default parameters O so that it can be called with only two or three actual parameters The function, getDimension that reads two double numbers from the user and return them. Arguments should be passed by references. The function does not return anything b. The function isDivisible that takes two int numbers and returns true if the first parameter is divisible by the second parameter, false otherwise. e.

Answer 1

20) True
21) a
22) False. void function has a return type of void.
23) True
24) True
25) a. reference
26)
A default argument is a value provided in a function declaration that is automatically assigned by the compiler if the caller of the function doesn’t provide a value for the argument with a default value.
Example:
----------
int sum(int x, int y=0, int z=0)
user can call this sum function with either 1 integer, 2 integers or 3 integers.
27)
a)  int sum(int, int, int=0, int=0);
b)  void getDimension(double&, double&);
c)  bool isDivisible(int, int);