The C++ standard library does not only contain functions, and refering to Matt Ball, the C and C++ "runtime" are runtime libraries, the .NET runtime is a runtime library and a runtime system.
The runtime environment can also be a virtual machine, such as the JRE (Java Runtime Environment) or CLR (Common Language Runtime) for .NET framework. What is the target of your program?
The C runtime library provides essential functions and support for C programs, including memory management, input/output operations, and mathematical computations.
runtime - это часть кода, существует в выполнимом файле (либо в отдельных so/dll) и обеспечивает всякие "удобства". Например, узнать тип объекта или сделать те же виртуальные вызовы.
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KGF Chapter 2 Ending Explained: How Did Rocking Star Yash’s Film End?
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