Chapter 2 CS 1436
The expression static_cast<int>(6.9) + static_cast<int>(7.9) evaluates to ____.
13
The length of the string "computer science" is ____.
16
Suppose that count is an int variable and count = 1. After the statement count++; executes, the value of count is ____.
2
The value of the expression 33/10, assuming both values are integral data types, is ____.
3 (not 3.0)
Suppose that alpha and beta are int variables. The statement alpha = ++beta; is equivalent to the statement(s) ____.
beta = beta + 1; alpha = beta;
Suppose that alpha and beta are int variables. The statement alpha = --beta; is equivalent to the statement(s) ____.
beta = beta - 1; alpha = beta;
____ is a valid int value.
46259 (no decimals)
The expression static_cast<int>(9.9) evaluates to ____.
9
In a C++ program, one and two are double variables and input values are 10.5 and 30.6. After the statement cin >> one >> two; executes, ____.
one = 10.5, two = 30.6
Suppose that sum and num are int variables and sum = 5 and num = 10. After the statement sum += num executes, ____.
sum = 15
A comma is also called a statement terminator. (T/F)
False
A mixed arithmetic expression contains all operands of the same type. (T/F)
False
An operator that has only one operand is called a unique operator. (T/F)
False
The escape sequence \r moves the insertion point to the beginning of the next line. (T/F)
False
Consider the following code. // Insertion Point 1 using namespace std; const float PI = 3.14; int main() { //Insertion Point 2 float r = 2.0; float area; area = PI * r * r; cout << "Area = " << area <<endl; return 0; } // Insertion Point 3
Insertion Point 1
Suppose a = 5. After the execution of the statement ++a; the value of a is 6. (T/F)
True
Suppose that sum is an int variable. The statement sum += 7; is equivalent to the statement sum = sum + 7; (T/F)
True
The maximum number of significant digits in float values is up to 6 or 7. (T/F)
True
The maximum number of significant digits in values of the double type is 15. (T/F)
True
Suppose that alpha and beta are int variables and alpha = 5 and beta = 10. After the statement alpha *= beta; executes, ____.
alpha = 50
Suppose that alpha and beta are int variables. The statement alpha = beta++; is equivalent to the statement(s) ____.
alpha = beta; beta = beta + 1;
Suppose that alpha and beta are int variables. The statement alpha = beta--; is equivalent to the statement(s) ____.
alpha = beta; beta = beta - 1;
The value of the expression 17 % 7 is ____.
3
____ is a valid char value.
'A' (no quotations, just apostrophe)
____ are executable statements that inform the user what to do.
Prompt lines
If a C++ arithmetic expression has no parentheses, operators are evaluated from left to right. (T/F)
True
Which of the following is the newline character?
\n
Which of the following is a legal identifier?
program_1
A(n) ____________________ is a memory location whose contents can be changed.
variable location variable Variable named location
Choose the output of the following C++ statement: cout << "Sunny " << '\n' << "Day " << endl;
Sunny \nDay
Which of the following is a reserved word in C++?
char
An example of a floating point data type is ____.
double
The memory allocated for a float value is ____ bytes.
four
The declaration int a, b, c; is equivalent to which of the following?
int a,b,c;