What is C++ - Interactive Quiz & Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print "Hello, C++!" to the console.

C++

#include <iostream>

int main() {
    std::cout << [1] << std::endl;
    return 0;
}

Drag options to blanks, or click blank then click option'

A"Hello, C++!"

BHello, C++!

Ccout << "Hello, C++!"

Dstd::endl

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting the double quotes around the text.

Trying to print without std::cout.

The text to print must be a string literal enclosed in double quotes.

2fill in blank

medium

Complete the code to declare an integer variable named 'age' with value 25.

C++

int [1] = 25;

Drag options to blanks, or click blank then click option'

Avalue

Bnumber

Cage

Dint

Attempts:

3 left

💡 Hint

Common Mistakes

Using a wrong variable name.

Trying to declare type twice.

Variable name should be 'age' as requested.

3fill in blank

hard

Fix the error in the code to correctly return 0 from main.

C++

int main() {
    return [1];
}

Drag options to blanks, or click blank then click option'

A0

Bone

C"0"

Dnull

Attempts:

3 left

💡 Hint

Common Mistakes

Returning a string instead of an integer.

Returning a non-zero value.

The return value must be the integer 0, not a string or other value.

4fill in blank

hard

Fill both blanks to declare a float variable 'pi' with value 3.14.

C++

[1] [2] = 3.14;

Drag options to blanks, or click blank then click option'

Afloat

Bdouble

Cpi

Dint

Attempts:

3 left

💡 Hint

Common Mistakes

Using int type for decimal values.

Wrong variable name.

Use 'float' as type and 'pi' as variable name.

5fill in blank

hard

Fill all three blanks to create a simple if statement that prints "Yes" if x is greater than 10.

C++

#include <iostream>

int main() {
    int x = 15;
    if (x [1] [2]) {
        std::cout << [3] << std::endl;
    }
    return 0;
}

Drag options to blanks, or click blank then click option'

A<

B10

C"Yes"

D>

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong comparison operator.

Forgetting quotes around the string.

The condition is 'x > 10' and the printed text is "Yes".