Exam 3: Expressions and Interactivity

Which line in the following program will cause a compiler error? 1 $\quad$ #include <iostream> 2 $\quad$ using namespace std; 3 4 $\quad$ int main() 5 $\quad$ { 6 $\quad$$\quad$ const int MY_VAL; 7 $\quad$$\quad$ MY_VAL = 77; 8 $\quad$$\quad$ cout << MY_VAL << endl; 9 $\quad$$\quad$ return 0; 10 $\quad$ }

The function, pow(x, 5.0), requires this header file.

You want the user to enter the length, width, and height from the keyboard. Which cin statement is correctly written?

What is the value of average after the following code executes? double average; Average = 1.0 + 2.0 + 3.0 / 3.0;

When using the sqrt function you must include this header file.

This manipulator is used to establish a field width for the value immediately following it.

You can use these to override the rules of operator precedence in a mathematical expression.

The statement cin >> setw(10) >> str; Will read up to this many characters into str.

In any program that uses the cin object, you must include the ___________.

The fixed manipulator causes a number to be displayed in scientific notation.

This stream manipulator forces cout to print the digits in fixed-point notation.

When a program uses the setw manipulator, the iosetwidth header file must be included in a preprocessor directive.

When C++ is working with an operator, it strives to convert the operands to the same type.

The only difference between the get function and the >> operator is that get reads the first character typed, even if it is a space, tab, or the [Enter] key.

Assume that x is an int variable. What value is assigned to x after the following assignment statement is executed? x = -3 + 4 % 6 / 5;

Which statement is equivalent to the following? x = x * 2;

The cin << statement will stop reading input when it encounters a newline character.

When this operator is used with string operands it concatenates them, or joins them together.

Which is true about the following statement? cout << setw(4) << num4 << " ";

In C++, it is impossible to display the number 34.789 in a field of 9 spaces with 2 decimal places of precision.