Section One

Question 1

What do you need to write C++

Answer 1

A text editor like notepad
A compiler like GCC to translate the code into a language that the computer will understand

Question 2

What is an IDE

Answer 2

Integrated Development Environment

Question 3

What compiler are you using

Answer 3

GCC from mysys2.org

Question 4

What is a header file library?
Show an example of one.

Answer 4

include <iostream></iostream>

Allows us to work with input and output objects.

Question 5

Make your program able to use names for objects and variables from the standard library

Answer 5

include <iostream></iostream>

using namespace std;

Question 6

What function is always required in your code? What happens to the code inside of it?

Answer 6

int main() {

}

Code inside curly brackets is always executed.

Question 7

What is an insertion operator?
Use it with an object to use hello world

Answer 7

int main() {
cout &laquo_space;“Hello World!”;
return 0;
}

&laquo_space;- insertion object

Question 8

What does every statement end with?

Answer 8

;

Question 9

How do you end the main function?

Answer 9

return 0

Question 10

What is a computer program?

Answer 10

List of instructions to be executed by a computer.

Question 11

What are the instructions that you give your computer called?

Answer 11

statements

Question 12

Add the numbers 3 + 3

Answer 12

include <iostream></iostream>

using namespace std;

int main() {
cout &laquo_space;3 + 3;
return 0;
}

Question 13

How do you insert a new line the popular way?

Answer 13

include <iostream></iostream>

\n - new line character that is an escape sequence

You can also do this

using namespace std;

int main() {
cout &laquo_space;“Hello World!” &laquo_space;“\n”;
cout &laquo_space;“I am learning C++”;
return 0;
}

Question 14

Other than \n, what is another way to create a blank line?

Answer 14

include <iostream></iostream>

using namespace std;

int main() {
cout &laquo_space;“Hello World!” &laquo_space;endl;
cout &laquo_space;“I am learning C++”;
return 0;
}

Question 15

How would you:
tab
insert a backslash
insert a double quote

Answer 15

\t

"

EXAMPLE
#include <iostream>
using namespace std;</iostream>

int main() {
cout &laquo_space;“They call him "Johnny".”;
return 0;
}

Question 16

How do you make a comment?

Answer 16

include <iostream></iostream>

using namespace std;

int main() {
// This is a comment
cout &laquo_space;“Hello World!”;
return 0;
}

OR

cout &laquo_space;“Hello World!”; // This is a comment

Question 17

Create a multiline comment

Answer 17

include <iostream></iostream>

using namespace std;

int main() {
/* The code below will print the words Hello World!
to the screen, and it is amazing */
cout &laquo_space;“Hello World!”;
return 0;
}

Question 18

What are the 5 variable types

Answer 18

int
double - float
char - single character
string
bool

Question 19

Create a variable named myNum and give it the value of 15

Print to screen

Answer 19

include <iostream></iostream>

using namespace std;

int main() {
int myNum = 15;
cout &laquo_space;myNum;
return 0;
}

OR ASSIGN THE VALUE LATER

int myNum;
myNum = 15;
cout &laquo_space;myNum;

Question 20

Create a variable and use it in a string to output the statement:
‘I am 34 years old’

Answer 20

include <iostream></iostream>

using namespace std;

int main() {
int myAge = 35;
cout &laquo_space;“I am “ &laquo_space;myAge &laquo_space;” years old.”;
return 0;
}

Question 21

Declare several integer variables

Answer 21

int x = 5, y = 6, z = 50;

Question 22

Create 3 integers and give them all the same value

Answer 22

include <iostream></iostream>

using namespace std;

int main() {
int x, y, z;
x = y = z = 50;
cout &laquo_space;x + y + z;
return 0;
}

Question 23

What are identifiers?

Answer 23

Variables must be identified with unique names

So basically variable names

Question 24

What do variables have to start with and what can they contain?

Answer 24

Names can contain letters, digits and underscores
Names must begin with a letter or an underscore (_)

Question 25

What is a constant? Make one

Answer 25

Read-only variable. It can't be changed. They HAVE TO contain a variable const int myNum = 15;

Question 26

Put user input into a variable and print it You'll need to use an extraction operator

Answer 26

int x; cout << "Type a number: "; // Type a number and press enter cin >> x; // Get user input from the keyboard cout << "Your number is: " << x; // Display the input value

Question 27

Using user input, create a calculator that takes two numbers and adds them together

Answer 27

int x, y; int sum; cout << "Type a number: "; cin >> x; cout << "Type another number: "; cin >> y; sum = x + y; cout << "Sum is: " << sum;

Question 28

What are the sizes of the below data types: bool char int double

Answer 28

bool - 1 byte char - 1 byte int - 2 or 4 bytes double 8 bytes

Question 29

Difference between a float and a double

Answer 29

The precision of a floating point value indicates how many digits the value can have after the decimal point. The precision of float is only six or seven decimal digits, while double variables have a precision of about 15 digits. Therefore it is safer to use double for most calculations.

Question 30

Code a boolean variable

Answer 30

bool isCodingFun = true; bool isFishTasty = false; cout << isCodingFun; // Outputs 1 (true) cout << isFishTasty; // Outputs 0 (false)

Question 31

Should you put a single character in single or double quotes?

Answer 31

single

Question 32

Do you need to include a certain library to use strings?

Answer 32

// Include the string library #include // Create a string variable string greeting = "Hello"; // Output string value cout << greeting;

Question 33

Using variables create a program that takes amount = 50 cost per item = 9.99 total cost = multiply here currency = $ - Just make the dollar sign in the variable to use in your program.

Answer 33

#include using namespace std; int main() { // Create variables of different data types int items = 50; double cost_per_item = 9.99; double total_cost = items * cost_per_item; char currency = '$'; // Print variables cout << "Number of items: " << items << "\n"; cout << "Cost per item: " << cost_per_item << "" << currency << "\n"; cout << "Total cost = " << total_cost << "" << currency << "\n"; return 0; }

Question 34

How do you increase a number by one?

Answer 34

int x = 10; ++x;