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#include <iostream>
#include <string>
#include <sstream>
#include <math.h>
using namespace std;
int hexstringtoint(string str)
{
string temp;
int * array;
temp.clear();
temp = str;
int ret = 0;
int size;
size = temp.length() ;
array = new int[size];
for(int i = 0; i < size;i++)
{
switch(temp[i])
{
case '0': array[i] = 0; break;
case '1': array[i] = 1; break;
case '2': array[i] = 2; break;
case '3': array[i] = 3; break;
case '4': array[i] = 4; break;
case '5': array[i] = 5; break;
case '6': array[i] = 6; break;
case '7': array[i] = 7; break;
case '8': array[i] = 8; break;
case '9': array[i] = 9; break;
case 'a': array[i] = 10; break;
case 'A': array[i] = 10; break;
case 'b': array[i] = 11; break;
case 'B': array[i] = 11; break;
case 'c': array[i] = 12; break;
case 'C': array[i] = 12; break;
case 'd': array[i] = 13; break;
case 'D': array[i] = 13; break;
case 'e': array[i] = 14; break;
case 'E': array[i] = 14; break;
case 'f': array[i] = 15; break;
case 'F': array[i] = 15; break;
}
}
for(int i = 0,j = size;i < size;i++,j--)
{
ret += array[i] * pow(16,static_cast<double>(j)-1);
}
delete [] array;
return ret;
}
string inttohexstring(int dec)
{
string sresult = "";
int * iresult = new int [sizeof(dec)];
int remainder = 0;
int quotient = 0;
int i = 0;
bool over = false;
int number = dec;
string array[] = {"0","1","2","3","4","5","6","7","8","9","A","B","C","D","E","F"};
while(number != 0)
{
remainder = number % 16;
number = number / 16;
iresult[i] = remainder;
sresult = array[remainder] + sresult;
i++;
}
delete [] iresult;
return sresult;
}
int main()
{
string input1,input2;
char op,exit;
int result;
bool over = false,invalidanswer = true;
string input;
string number;
int * num;
string operators;
int numofoperators = 0;
int sizeofinput;
bool done = false;
int counter1 = 0, counter2 = 0;
int decanswer = 0;
string hexanswer = "";
cout << ":Hexadecimal calculator:" << endl;
cout << "------------------------" << endl;
while(! over)
{
decanswer = 0;
counter1 = 0;
counter2 = 0;
number = "";
input = "";
operators = "";
numofoperators = 0;
cout << "Enter an equation (don't use spaces)" <<endl;
cout << "@>";
getline(cin,input);
sizeofinput = input.length();
num = new int [sizeofinput];
for(int i = 0;i < sizeofinput;i++)
{
if(input[i] == '+')
{
numofoperators++;
operators += '+';
}
else
if(input[i] == '-')
{
numofoperators++;
operators += '-';
}
else
if(input[i] == '*')
{
numofoperators++;
operators += '*';
}
else
if(input[i] == '/')
{
numofoperators++;
operators += '/';
}
else
if(input[i] == '%')
{
numofoperators++;
operators += '%';
}
}
done = false;
while(! done)
{
if(input[counter1] == ' ' || input[counter1] == '+'
|| input[counter1] == '*' || input[counter1] == '-'
|| input[counter1] == '/' || input[counter1] == '%')
{
counter1++;
num[counter2] = hexstringtoint(number);
if(input[counter1 + 1] != ' ' || input[counter1 + 1] != '+'
|| input[counter1 + 1] != '*' || input[counter1 + 1] != '-'
|| input[counter1 + 1] != '/' || input[counter1 + 1] != '%'
|| input[counter1 + 1])
{
counter2++;
number = "";
}
}
else
{
number += input[counter1];
counter1++;
}
if(input[counter1] == '\0')
{
done = true;
num[counter2] = hexstringtoint(number);
number = "";
}
}
//-----------------------------------------------
//i think the problem is here--------------------
//-----------------------------------------------
for(int i = 0;i != sizeofinput;i+=2)
{
switch(operators[i])
{
case '+':
decanswer += num[i] + num[i+1];
break;
case '-':
decanswer += num[i] - num[i+1];
break;
case '*':
decanswer += num[i] * num[i+1];
break;
case '/':
decanswer += num[i] / num[i+1];
break;
case '%':
decanswer += num[i] % num[i+1];
break;
}
}
cout << "Answer in dec:" << decanswer <<endl;
cout << "Answer in hex:" << inttohexstring(decanswer) << "h" << endl;
//----------------------------------------
invalidanswer = true;
while(invalidanswer)
{
cout << endl << "Exit? (y/n): ";
cin >> exit;
if(exit == 'y' || exit == 'Y')
{
over = true;
invalidanswer = false;
}
else
if(exit == 'n' || exit == 'N')
{
over = false;
invalidanswer = false;
}
else
{
cout << endl << "Invalid answer... try again." << endl;
invalidanswer = true;
}
}
delete [] num;
cin.ignore();
}
return 0;
}
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