std::stack push() method

since C++11

// (1) Non const version onlyvoid push( const value_type& value );// (2) Non const version onlyvoid push( value_type&& value );

until C++11

// (1) Non const version onlyvoid push( const value_type& value );

Pushes the given element value to the end of the stack

• (1) Effectively calls

  c.push_back(value)
• (2) Effectively calls

  c.push_back(std::move(value))

Parameters

• value - the value of the element to push

Return value

(none)

Exceptions

Equivalent to that of push_back of the underlying container.

Complexity

Equivalent to that of push_back of the underlying container.

Example

Main.cpp

#include <map>#include <stack>#include <array>#include <iostream>#include <stdexcept>#include <string_view> class BrainHackInterpreter {    std::map<unsigned, unsigned> open_brackets, close_brackets;    unsigned program_pos_{0};    std::array<std::uint8_t, 32768> data_;    int data_pos_{0};     void collect_brackets_positions(const std::string_view program) {        std::stack<unsigned> brackets_stack;         for (auto pos{0U}; pos != program.length(); ++pos) {            const char c{program[pos]};            if ('[' == c) {                brackets_stack.push(pos);            } else if (']' == c) {                if (brackets_stack.empty()) {                    throw std::runtime_error("brackets [] do not match!");                } else {                    open_brackets[brackets_stack.top()] = pos;                    close_brackets[pos] = brackets_stack.top();                    brackets_stack.pop();                }            }        }         if (!brackets_stack.empty())            throw std::runtime_error("brackets [] do not match!");    }     void check_data_pos(int pos) {        if (pos < 0 or pos >= static_cast<int>(data_.size()))            throw std::out_of_range{"data pointer out of bound"};    }   public:    BrainHackInterpreter(const std::string_view program) {        collect_brackets_positions(program);        data_.fill(0);         for (; program_pos_ < program.length(); ++program_pos_) {            switch (program[program_pos_]) {                case '<': check_data_pos(--data_pos_); break;                case '>': check_data_pos(++data_pos_); break;                case '-': --data_[data_pos_]; break;                case '+': ++data_[data_pos_]; break;                case '.': std::cout << data_[data_pos_]; break;                case ',': std::cin >> data_[data_pos_]; break;                case '[':                    if (data_[data_pos_] == 0)                        program_pos_ = open_brackets[program_pos_];                    break;                case ']':                    if (data_[data_pos_] != 0)                        program_pos_ = close_brackets[program_pos_];                    break;            }        }    }}; int main(){    BrainHackInterpreter    {		"-[------->+<]>-.--[-->+++<]>.[----->++<]>++.--------"		"----.+[->+++<]>.+++++++++++++..----.-----------.++++"		"+++++++++.-------.+++++++.---------.[--->+<]>---."    };}

Output

Hi, cppreference!