Input and Output in C++

Input and Output in C++ — a practical guide to C++ input output with clear examples you can reuse in real projects.

C++ Tutorial Series (15/111). Prefer one article? Read the complete C++ tutorial.

Short description

Prefer formatted IO carefully; validate user input.

I/O idea

std::cin → input
std::cout → output
std::cerr → errors
std::getline for lines