Quiz 2: C++ Basics

Given the following string variable declaration and statements:

string title;

int i;

title = "One String";

which of the following is the correct statement that assigns the length of the variable title to the variable i?

• i = One String.length();

• i = string.length();

• i = title.length();

• i = length();

Given the following string variable declaration and statements:

string title;

int j;

title = "This is Adam";

cout << title.substr(1,5) << endl;

What is the correct output?

Write a C++ statement that declares the variable firstInitial to be a character variable.

Given the following string variable declaration:

string name;

string lastName = "Green";

string firstName = "Cathy";

which of the following statement is the correct statement that assigns Green, Cathy to the variable name.

• name = "Green Cathy";

• name = lastName +", " + firstName;

• name = Green, Cathy;

• name = Green + ", " + Cathy;

What is the result of the following expression?

9/8

What is the result of the following expression?

11%9

Which of the following is the correct function call to calculate 12^5

• power(12,5)

• power(5,12)

• pow(12,5)

• exp(12,5)

Suppose a program contains the following variable declarations:

int test1Score;

int test2Score;

Which of the following input statement is the correct statement to read two input values?

• cin << test1Score << test2Score;

• cin >> test1Score,test2Score;

• cin >> test1Score >> test2Score >> endl;

• cin >> test1Score >> test2Score;

Which of the following is an invalid name for an identifier?

• 7Length

• M2

• total7

• lengthTotal

Write a C++ statement that declares the named constant PI which contains the value 3.14 and is a floating point constant.