# C++

URL: https://softwaredictionary.org/terms/cpp
Category: Programming Languages
Last updated: 2026-09-30
Pronunciation: SEE-PLUS-PLUS

In short: C++ is a compiled, statically typed language that extends C with classes and templates while keeping low-level control over memory and performance.

## What is C++?

C++ is a general-purpose programming language created by Bjarne Stroustrup at Bell Labs, starting in 1979 as "C with Classes" and renamed C++ in 1983. The name is a programmer's joke: `++` is the C operator that increases a value by one. It is standardized by ISO, with a new version about every three years, such as C++17, C++20, and C++23.

C++ is statically typed and compiles to native machine code. It supports several styles: procedural code like C, object-oriented code with classes and inheritance, and generic code with templates, which generate type-specific versions of functions and classes at compile time. There is no garbage collector; instead, modern C++ relies on RAII (Resource Acquisition Is Initialization), where an object releases its memory or other resources automatically in its destructor when it goes out of scope. Smart pointers such as `std::unique_ptr` and `std::shared_ptr` apply this idea to heap memory, so hand-written `new` and `delete` are rarely needed.

C++ is common in game engines, web browsers, databases, trading systems, embedded devices, and the performance-critical cores of machine learning libraries. Its guiding principle of "zero-overhead abstractions" means you shouldn't pay a runtime cost for features you don't use. Working in C++ is like having a fully equipped professional workshop: it can build almost anything, but it takes time to learn which tools are safe to use and when.

C++ is no longer just "C with extras." Although it can compile most C code, idiomatic modern C++ looks quite different, using standard containers like `std::vector` and `std::string` instead of raw arrays and manual memory management. It is also unrelated to C# beyond the name: C# is a separate language that runs on a managed runtime with a garbage collector.

## Key takeaways

- C++ compiles to native machine code and offers fine-grained control over performance.
- It supports procedural, object-oriented, and generic programming styles.
- Memory is managed through scope-based RAII and smart pointers rather than a garbage collector.
- It is common in game engines, browsers, databases, and other performance-critical software.

## Example: Standard containers manage memory for you

```cpp
#include <iostream>
#include <string>
#include <vector>

int main() {
    // std::vector frees its own memory: no manual delete needed
    std::vector<std::string> names = {"Ada", "Grace", "Alan"};
    names.push_back("Barbara");

    for (const auto& name : names) {
        std::cout << "Hello, " << name << "\n";
    }
    return 0;
}
```

## Frequently asked questions

**Is C++ harder to learn than other languages?**

C++ is generally considered one of the more complex languages because it is large and gives you direct control over memory. Many learners start with a smaller subset of modern C++, using standard containers and smart pointers, and grow from there.

**What is the difference between C++ and C#?**

They are separate languages. C++ compiles to native code and manages memory without a garbage collector, while C# runs on the .NET runtime with automatic garbage collection.

**What does RAII mean in C++?**

RAII (Resource Acquisition Is Initialization) means tying a resource, such as memory, a file, or a lock, to an object's lifetime. The resource is released automatically in the object's destructor when the object goes out of scope.

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