c-resources/CPlusPlus20ForProgrammers-m.../examples/ch13/fig13_10.cpp

63 lines
2.6 KiB
C++

// fig13_10.cpp
// Standard library stack adaptor class.
#include <iostream>
#include <list> // list class-template definition
#include <ranges>
#include <stack> // stack adaptor definition
#include <vector> // vector class-template definition
// pushElements generic lambda to push values onto a stack
auto pushElements = [](auto& stack) {
for (auto i : std::views::iota(0, 10)) {
stack.push(i); // push element onto stack
std::cout << stack.top() << ' '; // view (and display) top element
}
};
// popElements generic lambda to pop elements off a stack
auto popElements = [](auto& stack) {
while (!stack.empty()) {
std::cout << stack.top() << ' '; // view (and display) top element
stack.pop(); // remove top element
}
};
int main() {
std::stack<int> dequeStack{}; // uses a deque by default
std::stack<int, std::vector<int>> vectorStack{}; // use a vector
std::stack<int, std::list<int>> listStack{}; // use a list
// push the values 0-9 onto each stack
std::cout << "Pushing onto dequeStack: ";
pushElements(dequeStack);
std::cout << "\nPushing onto vectorStack: ";
pushElements(vectorStack);
std::cout << "\nPushing onto listStack: ";
pushElements(listStack);
// display and remove elements from each stack
std::cout << "\n\nPopping from dequeStack: ";
popElements(dequeStack);
std::cout << "\nPopping from vectorStack: ";
popElements(vectorStack);
std::cout << "\nPopping from listStack: ";
popElements(listStack);
std::cout << "\n";
}
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