What happens if you call top() on an empty stack in C++?It returns 0It throws an exceptionIt returns a garbage valueIt returns the last element pushed onto the stack
Question
What happens if you call top() on an empty stack in C++?It returns 0It throws an exceptionIt returns a garbage valueIt returns the last element pushed onto the stack
Solution
If you call top() on an empty stack in C++, it does not return 0, nor does it return the last element pushed onto the stack. It also does not throw an exception by itself. Instead, it leads to undefined behavior, which often means it could return a garbage value. However, this is not guaranteed and the actual result can depend on various factors such as the specific implementation of the C++ standard library. It's generally a good practice to always check if the stack is empty before calling top() to avoid such undefined behavior.
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