How to Learn C++ as a Beginner

Step 1 - skip C, start with C++

A common worry is that you must learn C before C++. The C++ FAQ on isocpp.org answers that directly: "Don't bother." Bjarne Stroustrup, who created C++, says the same in his own FAQ. His reasoning is that the shared subset of C and C++ is easier to learn than C alone, the C++ type system catches more mistakes for you, and the libraries are better.

So start with modern C++. That means using things like std::string for text and std::vector for lists, rather than the older C-style tricks many old tutorials still teach.

Step 2 - choose one main learning source

Do not collect ten tutorials. Choose one and follow it in order.

• learncpp.com is a free online course. Its introduction says the tutorials "don't assume you have any prior programming experience," and it covers good habits, common pitfalls and debugging alongside the language. It also says there is no set pace, so you can move through it as slowly as you need.
• Programming: Principles and Practice Using C++ is Stroustrup's book for people who have never programmed. Both isocpp.org and the C++ FAQ recommend it for complete beginners. Stroustrup says it was written for first-year university students.

Stroustrup's FAQ makes two points worth taking seriously. You will need a proper textbook or course, because reference documentation and sample code "are not good teachers of concepts." And if you are new to programming, he strongly recommends finding an experienced programmer to help you, so small confusions do not grow into big frustrations. A teacher, a classmate or a study group all count.

C++ Game: Segfault

Teaches C++ to complete beginners as a game where you tap one real line of code at a time.

Get it on Google Play

Free to play. Halls 1 to 4 are free with no time limit, and free players can watch optional rewarded video ads for bonuses. Segfault Pro, a monthly subscription or a 3-month pass paid once, opens hall 5 and up, unlimited practice sets and mock exams, with no ads.

If writing code from a blank screen feels like too big a first step, Segfault lets you start by tapping real C++ lines and watching what each one does to a value, one idea at a time, before you type anything. Use it alongside a course, not instead of one.

Step 3 - get a compiler working

C++ is a compiled language: a program called a compiler turns your code into something the computer can run. The isocpp.org Get Started page lists free options:

• GCC (the g++ command), available for Windows and through most Linux package managers
• Clang, an open-source compiler for many platforms
• Visual Studio Community, a free compiler and editor from Microsoft for Windows

If installing feels daunting, the same page lists online compilers, such as godbolt.org and Wandbox, that run in your browser. You can learn your first few weeks of C++ that way and install a compiler later.

Step 4 - write your first program

Your first program will look something like this. It stores a number, changes it and prints the result.

#include <iostream>

int main() {
    int coins = 3;
    coins = coins + 2;
    std::cout << coins << '\n'; // prints 5
}

Every C++ program starts running at main. The line with int coins = 3; creates a variable, a named box holding a whole number. The next line takes the value in the box, adds 2 and puts the result back. The std::cout line prints it.

Type it yourself rather than copying it. Then change one thing at a time: start with 10 instead of 3, or subtract instead of add, and predict the output before you run it. That habit of predicting first is what turns reading into learning.

Step 5 - learn the core ideas in order

Most beginner courses cover roughly the same early topics. Do not rush past any of them:

1. Variables and types: int, double, bool, std::string.
2. Input and output: printing with std::cout and reading with std::cin.
3. Arithmetic: including the surprise that dividing two whole numbers drops the remainder.
4. Decisions: if and else, and comparisons like == and !=.
5. Loops: for and while.
6. Functions: naming a piece of code so you can reuse it.
7. Arrays and vectors: storing many values under one name.

Here is a small program that uses a loop and an array together:

#include <iostream>

int main() {
    int scores[3] = {10, 20, 30};
    for (int i = 0; i < 3; i++) {
        std::cout << scores[i] << '\n';
    }
}

When you understand why it prints 10, 20 and 30, and what would go wrong if the loop ran one step too far, you are ready for the next topic. That last question leads to one of the most famous C++ errors, explained in what is a segmentation fault.

Step 6 - read errors, do not fear them

The compiler will reject your code often. That is normal. Read the first error message, not the last, and look at the line number it gives. Most early errors are a missing semicolon, a misspelt name or a missing #include. Fix one, compile again, repeat.

Turn on warnings as well. With GCC or Clang, adding -Wall -Wextra to the compile command makes the compiler point out code that is legal but probably wrong.

Step 7 - build tiny projects

After the basics, give yourself small programs to write without a tutorial open:

• a tip calculator that reads a bill and prints the total
• a number guessing game using if and a loop
• a program that reads ten numbers and prints the biggest
• a times-table printer using a function

Small and finished beats large and abandoned. The C++ FAQ on isocpp.org also suggests looking at textbook exercises for ideas, noting that many are designed to keep a student busy for several days.

How long will it take

Stroustrup's FAQ says it depends what you mean by learning. At Texas A&M, his book takes first-year students through the fundamentals in a semester. Becoming fully comfortable with all the major parts of the language and its design techniques can take a year or two. For a beginner, a realistic first goal is the core ideas in Step 5. Going by that one-semester figure, expect months of regular practice rather than weeks.

For a frank look at what makes the language tricky, read is C++ hard to learn.