bigNumber numberFromVector(vector<int> &vec, bool neg, int dec, settings &user)
{
bigNumber temp;
temp.setBase(user.getBase());
for (int i=0; i<vec.size(); i++)
{
int numberToUse = vec.at(vec.size()-i-1);
int locationToSet = PRECISION + i;
temp.setDigit(locationToSet, numberToUse);
}
if (neg)
temp.setNegative();
temp.divideByTen(dec);
return temp;
}
bool isNumber(char const &c, settings &user)
{
return (checkNumber(c) >= 0 && checkNumber(c) <= (user.getBase()-1) );
}
solution solve(string &c, bigNumber previous, settings &user)
{
c += '$';
PTYPE pType=ERROR;
vector<int> first;
vector<int> second;
bigNumber bn1;
bigNumber bn2;
bigNumber temp;
bn1.setBase(user.getBase());
bn2.setBase(user.getBase());
temp.setBase(user.getBase());
int decimalCount1=0;
int decimalCount2=0;
int commaNumbers=0;
int numbers=0;
bool decimal=false;
bool comma=false;
bool negative1=false;
bool negative2=false;
bool done=false;
bool printExact=false;
bool printStats=false;
bigNumber* targetBN = &bn1;
vector<int>* targetVec = &first;
int* targetDec = &decimalCount1;
bool* targetNegative = &negative1;
int counter = c.size();
for (int i=0; i<counter; i++)
{
if (checkWord(c, i, "pi"))
{
if (numbers>0 || comma==true || decimal==true)
{
RETURN_ERROR;
}
else
{
string piString(PI);
for (int piMarker=PRECISION; piMarker>=0; piMarker--)
{
char piChar = '0';
int piNum = piString[PRECISION-piMarker] - piChar;
(*targetVec).push_back(piNum);
}
done=true;
*targetDec = PRECISION;
numbers += (PRECISION+1);
counter += 2;
i += 2;
}
}
if (checkWord(c, i, "theta"))
{
if (numbers>0 || comma==true || decimal==true)
{
RETURN_ERROR;
}
else
{
string thetaString(THETA);
for (int thetaMarker=PRECISION; thetaMarker>=0; thetaMarker--)
{
char thetaChar = '0';
int thetaNum = thetaString[PRECISION-thetaMarker] - thetaChar;
(*targetVec).push_back(thetaNum);
}
done=true;
*targetDec = PRECISION;
numbers += (PRECISION+1);
counter += 5;
i += 5;
}
}
//if it isn't a space, number, symbol, end marker, or decimal point, return error
if (checkSpace(c[i])==false &&
isNumber(c[i], user)==false &&
isSymbol(c[i])==false &&
c[i] != '$' &&
c[i] != ',' &&
c[i] != '.')
{
RETURN_ERROR;
}
if (c[i]==',')
{
if (comma==false)
{
if (decimal==true || numbers==0 || numbers > 3 || done==true)
RETURN_ERROR;
else comma = true;
}
else if (commaNumbers != 3)
RETURN_ERROR;
commaNumbers=0;
}
//if it's a space
else if (checkSpace(c[i])==true)
{
//if it's preceeded by a number, number is complete
if (isNumber(c[i-1], user))
{
done = true;
}
//if negative is set, and it is preceeded by a minus symbol, return error
else if (checkSymbol(c[i-1]) == SUBTRACT && *targetNegative == true)
{
RETURN_ERROR;
}
}
//if it's a number
else if (isNumber(c[i], user))
{
//if number was complete, return error
if (done==true)
{
RETURN_ERROR;
}
if (comma==true)
commaNumbers++;
//otherwise add number to target vector, add decimal count if needed
(*targetVec).push_back(checkNumber(c[i]));
numbers++;
if (decimal==true)
{
(*targetDec)++;
}
}
//if it's a minus symbol
else if (checkSymbol(c[i]) == SUBTRACT)
{
//if no numbers have been added
if (numbers==0)
{
//if target isn't negative, make target negative
if ((*targetNegative)==false)
{
(*targetNegative) = true;
(*targetBN).setNegative();
}
//if target is negative, no numbers have been added, and the target is the first number:
//there are two minus symbols, which means the intent is to
//subtract a negative number from previous
else if (targetBN == &bn1)
{
pType = SUBTRACT;
targetBN = &bn2;
numbers=0;
commaNumbers=0;
comma=false;
bn2.setNegative(); //sets 2nd number to negative
negative2=true; //sets 2nd number to negative
targetNegative= &negative2;
done=false;
targetDec = &decimalCount2;
targetVec = &second;
decimal=false;
}
else
{
RETURN_ERROR;
}
}
//if numbers have been added, and the target is the first number, the problem type is subtraction
else if (targetBN == &bn1)
{
if (comma==true && decimal==false && commaNumbers != 3)
RETURN_ERROR;
pType = SUBTRACT;
numbers=0;
commaNumbers=0;
comma=false;
done=false;
targetBN = &bn2;
targetNegative= &negative2;
targetDec = &decimalCount2;
targetVec = &second;
decimal=false;
}
//if numbers have been added, and the target is the second number, return error
else
{
RETURN_ERROR;
}
}
//if it's a symbol other than minus
else if (checkSymbol(c[i]) != ERROR && checkSymbol(c[i]) != SUBTRACT)
{
//if the type is already established, return error
if (pType != ERROR)
{
RETURN_ERROR;
}
//otherwise, set problem type based on symbol and reset figures
else
{
if (comma==true && decimal==false && commaNumbers != 3)
RETURN_ERROR;
pType = checkSymbol(c[i]);
targetBN = &bn2;
numbers=0;
commaNumbers=0;
comma=false;
done=false;
targetNegative = &negative2;
targetDec = &decimalCount2;
targetVec = &second;
decimal=false;
}
}
//if it's a decimal point
else if (c[i]=='.')
{
//if there's already been a decimal point, return error
if (decimal==true)
{
RETURN_ERROR;
}
else decimal = true;
if (comma==true && commaNumbers != 3)
RETURN_ERROR;
}
//if it's an endline character
else if (c[i] == '$')
{
if (comma==true && decimal==false && commaNumbers != 3)
RETURN_ERROR;
//if both numbers are empty
if (first.size()==0 && second.size()==0)
{
if (pType==FACTORIAL)
{
bn1 = previous;
}
else RETURN_ERROR;
}
//if first number is empty, set bn1 to previous
if (first.size()==0)
{
bn1 = previous;
}
//otherwise create bn1 from entered and print it as is
else
{
bn1 = numberFromVector(first, negative1, decimalCount1, user);
printExact=true;
}
//if second number is empty
if (second.size()==0)
{
//if first number is negative and pType is undefined, subtract number from previous
if (negative1==true && pType == ERROR)
{
bn1.setPositive();
temp = previous - bn1;
cout << "Entered: ";
displayNumber(previous, user, false, false);
cout << " - ";
displayNumber(bn1, user, true, false);
RETURN_OK(temp);
//return solution(temp, 0);
}
//if first number isn't negative and no problem type has been declared, return that number
else if (pType == ERROR)
{
cout << "Entered: ";
displayNumber(bn1, user, true, false);
RETURN_OK(bn1);
//return solution(bn1, 0);
}
else if (pType != FACTORIAL)
{
RETURN_ERROR;
}
}
//otherwise take ints from second vector and use to set bigNumber2
else
{
bn2 = numberFromVector(second, negative2, decimalCount2, user);
}
cout << "Entered: ";
displayNumber(bn1, user, printExact, printStats);
break;
}
}
//use problem type to calculate solution, return with no errors if valid
switch(pType)
{
case ERROR: RETURN_ERROR;
case ADD: cout << " + "; bn2.printNumber();
temp = bn1 + bn2;
RETURN_OK(temp);
case SUBTRACT: cout << " - "; bn2.printNumber();
temp = bn1 - bn2;
RETURN_OK(temp);
case MULTIPLY: cout << " * "; bn2.printNumber();
temp = bn1 * bn2;
RETURN_OK(temp);
case DIVIDE: cout << " / "; bn2.printNumber();
if (bn2==0)
{
RETURN_ERROR;
}
temp = bn1 / bn2;
RETURN_OK(temp);
case FACTORIAL:
if (bn1<0 || bn1.getDecimalCount() > 0)
{
RETURN_ERROR;
}
else if (bn1==0)
{
cout << "!";
bigNumber fact(1);
fact.setBase(user.getBase());
RETURN_OK(fact);
}
temp = bigNumber::factorial(bn1);
cout << "!";
RETURN_OK(temp);
case EXPONENT: cout << "^"; bn2.printNumber();
temp = bigNumber::exponent(bn1, bn2);
RETURN_OK(temp);
case ITERATION: cout << "c"; bn2.printNumber();
temp = bigNumber::iterations(bn1, bn2);
RETURN_OK(temp);
default: RETURN_ERROR;
}
}