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Chapter 1

Chapter 1

C++ Basics

This activity contains 10 questions.

	Which of the following is a valid name for an identifier?   _foobar_2 2fast interest rate cout

	What data types can be used to store numeric values with a decimal point, such as 3.14 ?   long float, double char short, int

	Which of the following statements will correctly output the quote: Dan Quayle once said, "Who's responsible for the riots? The rioters."   cout << "Dan Quayle once said, Who's responsible for the riots? The rioters."; cout << "Dan Quayle once said, \"Who's responsible for the riots? The rioters. \" "; cout << "Dan Quayle once said, "Who's responsible for the riots? The rioters. " "; cout << "Dan Quayle once said, "Who\'s responsible for the riots? The rioters. " ";

	What value is stored in variable x? int x; x = 2 * 3 + 4 * 5 -- 4 / 2;   23 11 14 28

	What value is stored in x after the following two statements are executed: int x; x = 2 / 4 * 4 / 2;   1 1.0 0.0625 0

	Runners often think of their speed in terms of how many minutes and seconds it takes to run a mile, but most treadmills express speed in miles per hour. Which expression correctly converts from 6.5 miles per hour to output the pace in minutes and seconds?   int secsPerMile = static_cast<int<(3600 / 6.5); int paceMins, paceSecs; paceMins = secsPerMile / 60; paceSecs = paceMin % 60; int secsPerMile = static_cast<int<(3600 / 6.5); int paceMins, paceSecs; paceMins = secsPerMile / 60; paceSecs = secsPerMile / 60 / 60; int secsPerMile = static_cast<int<(3600 * 6.5); int paceMins, paceSecs; paceMins = secsPerMile / 60; paceSecs = secsPerMile % 60; int secsPerMile = static_cast<int<(3600 / 6.5); int paceMins, paceSecs; paceMins = secsPerMile / 60; paceSecs = secsPerMile % 60;

	What will the following code output? int x, y; x=3; y=(++x)*2; cout << x << " " << y << endl;   3 6 3 8 4 8 4 6

	How can we input a value from the keyboard and store it in the variable named num?   cout << num; cin << num; num = input(); cin >> num;

	Which of the following is an invalid comment?   /************************** * Comment about the program **************************/ // Comment regarding the program /* Comment regarding the program */ /* Comment regarding the program

	For a newer C++ compiler, what must be added to the top of the program to allow access to cin and cout?   #include <iostream.h> using namespace std; #include <iostream> using namespace std; using namespace std; #include <iostream.h>

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