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#include <iostream>
#include <cstdlib>
#include <sstream>
#include <string>
#include <cmath>
#include <cstring>
#include <stack>
#include <algorithm>
using namespace std;
class Calculator
{
public:
Calculator();
virtual ~Calculator();
void readEquation();
float nextNumber(int position, int*& );
string equation;
protected:
float add(float firstNumber, float secondNumber);
float subtract (float firstNumber, float secondNumber);
float multiply (float number, float multiple);
float divide (float numerator, float denominator);
float squareRoot(float number);
float square(float number);
private:
void temporaryPrintStack();
float answer();
stack<float>* numberStack;
};
Calculator::Calculator(){
numberStack = new stack<float>();
cout<<"Stack created.\n";
}
Calculator::~Calculator(){
delete numberStack;
numberStack=NULL;
cout<<"Stack destroyed.\n";
}
float Calculator::add(float numOne,float numTwo){
cout<<"Calculating "<<numOne<<" + "<<numTwo<<".\n";
return numOne+numTwo;
}
float Calculator::answer(){
return this->numberStack->top();
}
void Calculator::temporaryPrintStack()
{
cout<<"Stack: ";
for(int index = 0; index <= (int) this->numberStack->size();index++)
{
cout<<this->numberStack->top()<<", ";
this->numberStack->pop();
}
cout<<endl;
}
float Calculator::nextNumber(int position,int*& returnPosition)
{
stringstream convertCharacterTokensToString;
for(string::iterator next = equation.begin()+position+1;next!=equation.end();next++)
{
if(*next >= '0' && *next<='9')
{
convertCharacterTokensToString<<*next;
}
if(*next == '+' || *next == '-' || *next=='=')
{
string nextNumber;
convertCharacterTokensToString>>nextNumber;
cout<<"The next number is: "<<nextNumber<<".\n";
*returnPosition = std::distance(this->equation.begin(),next);//ACCESS VIOLATION: SEGMENTATION FAULT
cout<<"The next number is: "<<nextNumber<<".\n";
return atof(nextNumber.c_str());
}
}
}
void Calculator::readEquation()
{
stringstream convertCharacterTokensToString;
//add code to remove all spaces
for(string::iterator iterator = this->equation.begin();iterator!=this->equation.end();iterator++)
{
if(*iterator>='0' && *iterator<='9' || *iterator=='.')
convertCharacterTokensToString<<*iterator;
if(*iterator=='+')
{
string number;
convertCharacterTokensToString>>number;
cout<<number<<" pushed to stack."<<endl;
this->numberStack->push(atof(number.c_str()));
int* returnPosition;
this->numberStack->push(this->add(this->numberStack->top(),
this->nextNumber(std::distance(this->equation.begin(),iterator), returnPosition)));
this->temporaryPrintStack();
cout<<"The return character is: "<<*returnPosition<<".\n";
}
if(*iterator=='=')
{
this->answer();
}
}
}
int main()
{
Calculator *c=new Calculator();
std::cout<<"Enter sum: ";
getline(cin,c->equation);
c->readEquation();
system("pause");
delete c; c = NULL;
return 0;
}
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