What is the lifetime of local variables of a C++ function?

C Local variables of a function exist during function execution and are destroyed when the function returns. Their scope is limited to the function and cannot be accessed outside the function.

The lifetime of local variables of C function

In C, local variables are variables declared and initialized inside the function . Their scope is limited to that function, meaning they can only be accessed and modified during function execution.

The lifetime of local variables:

• Local variables are created when the function is called.
• Local variables exist during function execution.
• Local variables are destroyed when the function returns.

Practical case:

Let us consider the following C function:

void printNumbers() {
  int number = 10;  // 局部变量
  cout << "Number: " << number << endl;
}

When the printNumbers() function is When called, the local variable number will be created and initialized to 10. This variable will exist during the execution of the function, that is, after the statement where it prints "Number: 10". When the function returns, number is destroyed so it cannot be accessed outside the function.

Points:

• The scope of a local variable is limited to the function in which it is declared.
• Local variables exist during function execution and are destroyed when the function returns.
• Local variables cannot be accessed outside the function.

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