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std::stack::top(3) C++ Standard Libary std::stack::top(3) NAME std::stack::top - std::stack::top Synopsis reference top(); const_reference top() const; Returns reference to the top element in the stack. This is the most recently pushed element. This element will be removed on a call to pop(). Effec- tively calls c.back(). Parameters (none) Return value Reference to the last element Complexity Constant Example // Run this code #include <stack> #include <iostream> void reportStackSize(const std::stack<int>& s) { std::cout << s.size() << " elements on stack\n"; } void reportStackTop(const std::stack<int>& s) { // Leaves element on stack std::cout << "Top element: " << s.top() << '\n'; } int main() { std::stack<int> s; s.push(2); s.push(6); s.push(51); reportStackSize(s); reportStackTop(s); reportStackSize(s); s.pop(); reportStackSize(s); reportStackTop(s); } Output: 3 elements on stack Top element: 51 3 elements on stack 2 elements on stack Top element: 6 See also push inserts element at the top (public member function) pop removes the top element (public member function) http://cppreference.com 2022.07.31 std::stack::top(3)
NAME | Synopsis | Parameters | Return value | Complexity | Example | Output: | See also
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