What is the stack's behavior after executing the following sequence of operations in C++?std::stack<int> s;s.push(1);s.push(2);s.pop();std::cout << s.top();12Compilation errorRuntime error
Question
What is the stack's behavior after executing the following sequence of operations in C++?std::stack<int> s;s.push(1);s.push(2);s.pop();std::cout << s.top();12Compilation errorRuntime error
Solution
The stack's behavior after executing the given sequence of operations in C++ would be as follows:
-
std::stack<int> s;- This line of code declares a stack of integers named 's'. At this point, the stack is empty. -
s.push(1);- This line pushes the integer '1' onto the stack. Now, the stack 's' contains one element: [1]. -
s.push(2);- This line pushes the integer '2' onto the stack. Now, the stack 's' contains two elements: [1, 2]. The top of the stack is '2'. -
s.pop();- This line pops the top element from the stack. After this operation, the stack 's' goes back to containing one element: [1]. -
std::cout << s.top();- This line prints the top element of the stack to the console. Since the top of the stack is '1', '1' is printed.
So, the output of this sequence of operations would be '1'. There would be no compilation error or runtime error.
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