1) In function `_start': undefined reference to `main'

error: cout was not declared in this scope

2) Declare an integer variable, x, initialized with the value 6, and a reference to x called ref.

Given your declarations above and the following code:

int y = 5;

ref = y;

ref = 7;

What are the respective values of x and y?

3)Declare a function foo that takes an int, an int reference, and a bool.

4) Should you pass a variable by value, by reference, or by const reference?

• if its a basic type that you dont want to modify

• if its a composite (non-basic) type that you dont want to modify

• if its a basic type that you do want to modify

• if its a composite type that you do want to modify

5) What is wrong with this code?

int& foo(int x) {

int& y = x;

return y;

}