소멸자 호출 오류 도와주세요ㅠㅠ

#ifndef STACK_H
#define STACK_H
 
int priority(char oper);
 
#include "Calculator.h"
#include "Stack.h"
 
class Calculator;
 
class Stack {
private:
	char * _stack;
	int _size;
 
public:
	Stack();
	~Stack();
	void putOperator(char input, Calculator cal);
	void putElement(char input);
	void removeElement();
	void ifThereisBlanket(Calculator cal);
	void TomakeStackEmpty(Calculator cal);
 
};
 
#endif // !STACK_H
 
 
#pragma once

#ifndef CALCULATOR_H
#define CALCULATOR_H
 
#include "Stack.h"
#include "Calculator.h"
 
class Calculator {
private:
	char * _infix;
	char * _postfix;
	int _size_pos;
	Stack stack;
	int _result;
 
public:
	Calculator();
	~Calculator();
	void setInfix();
	void setPostfix();
	char * showPostfix();
	void calculate();
	int getResult();
	void putElement(char input);
 
};
 
#endif // !CALCULATOR_H
 
 
#pragma once

#include <iostream>
#include <cstring>
#include "Calculator.h"
#include "Stack.h"
 
using namespace std;
 
Calculator::Calculator() {
	_infix = new char[100];
	_postfix = new char[100];
	cout << "생성자 생성\n";
	_size_pos = 0;
}
 
Calculator::~Calculator() {
	delete[] _infix;
	delete[] _postfix;
}
 
void Calculator::setInfix() {
	cout << "수식을 입력하시오: ";
	cin.getline(_infix, 100);
 
}
 
void Calculator::setPostfix() {
	for (int i = 0; i < strlen(_infix) + 1; i++) {
		if (_infix[i] >= '0' && _infix[i] <= '9') {
			this->putElement(_infix[i]);
			cout << "상수 넣음\n";
		}
		else if (_infix[i] == '+' || _infix[i] == '-' || _infix[i] == '*' || _infix[i] == '/' || _infix[i] == '(') {
			this->putElement('|');
			stack.putOperator(_infix[i], *this);
			cout << "연산자 넣음\n";
		}
		else if (_infix[i] == ')') {
			this->putElement('|');
			stack.ifThereisBlanket(*this);
			cout << "닫는괄호 사용함\n";
		}
	}
	cout << "끝내기\n";
	stack.TomakeStackEmpty(*this);
}
 
Stack::~Stack() {
	delete[] _stack;
	cout << "소멸자 호출";
}
 
void Stack::putOperator(char input, Calculator cal) {
	if (this->_size == 0) {
		this->putElement(input);
	}
 
	else if (priority(_stack[this->_size - 1]) < priority(input)) {
		this->putElement(input);
	}
	else {
		cal.putElement(_stack[this->_size - 1]);
		this->removeElement();
		this->putElement(input);
		//stack[_size-1]을 바깥세상으로 탈주시키고 그 자리에 input을 stack[_size-1]에 넣는다.
 
	}
}
 
void Stack::putElement(char input) {
	_stack[_size] = input;
	this->_size++;
}

#include <iostream>
#include "Calculator.h"
#include "Stack.h"
using namespace std;
 
int main() {
	Calculator calculator;
 
	calculator.setInfix();
	calculator.setPostfix();
	calculator.showPostfix();
 
	return 0;
}