Can you tell us something about scope rules in C++?

Question

Accepted Answer

Scope rules in C++ determine the visibility and accessibility of variables and functions within a program.

Variables declared within a block have local scope and are only accessible within that block.
Global variables have file scope and can be accessed from any function within the file.
Function parameters have function scope and are only accessible within that function.
Nested blocks can have their own scope, and variables declared within them are only accessible within that block.
C++ also supports namespaces, which allow for the creation of separate scopes for different sets of identifiers.

Accepted Answer

The scope rules of a language decide in which parts of a program a particular piece of code or data item can be accessed. Identifiers declared in the outermost block of a function have function scope. They can be accessed only in the function that declares them.

Can you tell us something about scope rules in C++?

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