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C++

Learn systems programming with C++.

1

Hello World

C++ uses cout for output. Include <iostream> header and use the std namespace.

Example

Run this example to see how it works and then try the exercise.

example.cpp
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Output
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Exercise

Your task: Use cout to print "Hello, World!"

main.cpp
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Output
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Quiz

Which operator is used with cout to output data?

SUMMARY

In this section, you learned how to print output to the console. Next, you’ll learn how to declare variables and work with different data types.

2

Variables and Data Types

C++ is statically typed - you must declare the type before using a variable.

Example

Run this example to see how it works and then try the exercise.

example.cpp
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Output
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Exercise

Your task: Declare variables: name (string), age (int)

main.cpp
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Output
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Quiz

What does "statically typed" mean in C++?

SUMMARY

In this section, you learned how to declare variables and work with different data types. Next, you’ll learn how to get user input from the console.

3

Arithmetic Operations

C++ supports all standard arithmetic operations. Integer division truncates the decimal part.

Example

Run this example to see how it works and then try the exercise.

example.cpp
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Output
Click "Run" to see the example in action...
Exercise

Your task: Calculate area and print "Area: {area}"

main.cpp
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Output
Click "Run" to execute your code...
Quiz

What is the result of 17 / 5 in C++ (both are int)?

SUMMARY

In this section, you learned how to get user input from the console. Next, you’ll learn how to perform mathematical operations.

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Locked lessons:
  • String Operations
  • Conditionals
  • Switch Statement
  • For Loops
  • While Loops
  • Functions
  • Vectors
  • Classes and Objects
  • Final Project: Student Grade System
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