52 lines
727 B
Go
52 lines
727 B
Go
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package stack
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type Stack struct {
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size int
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height int
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data []int
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next *Stack // Pointer to the next element in the stack stack
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}
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func NewStack() *Stack {
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return &Stack{
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size: 32,
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height: 0,
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data: make([]int, 32),
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next: nil,
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}
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}
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func (s *Stack) Clear() {
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s.height = 0
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}
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func (s *Stack) Duplicate() {
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if s.height > 0 {
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s.Push(s.data[s.height-1])
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}
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}
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func (s *Stack) Pop() int {
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if s.height > 0 {
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s.height--
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return s.data[s.height]
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}
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return 0
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}
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func (s *Stack) Push(value int) {
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if s.height >= s.size {
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s.size += 32
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s.data = append(s.data, make([]int, 32)...)
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}
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s.data[s.height] = value
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s.height++
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}
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func (s *Stack) Swap() {
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a := s.Pop()
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b := s.Pop()
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s.Push(a)
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s.Push(b)
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}
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