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pcalc.cpp
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pcalc.cpp
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#include "Polynomial.hpp"
#include <fstream>
#include <sstream>
void readPoly(Polynomial &p, Polynomial &q, std::stringstream &ss1, std::stringstream &ss2); //Read in polynomials
bool operate(Polynomial p, Polynomial q, std::string sign, std::ostream &out); //Do calculations
int main(int argc, char* argv[])
{
if (argc == 2) //Executable and input file
{
std::ifstream in(argv[1]);
std::string poly1;
std::string poly2;
std::string sign;
//Prime test process reprime
getline(in, poly1, ' ');
getline(in, sign, ' ');
getline(in, poly2, '\n');
while (!in.fail())
{
Polynomial p;
Polynomial q;
std::stringstream ss1(poly1); //Like ifstream but for a string
std::stringstream ss2(poly2);
readPoly(p,q,ss1,ss2);
if (!operate(p,q,sign,std::cout))
{
return EXIT_FAILURE;
}
getline(in, poly1, ' ');
getline(in, sign, ' ');
getline(in, poly2, '\n');
}
}
else if (argc == 3) //Executable input output file
{
std::ifstream in(argv[1]);
std::ofstream out(argv[2]);
std::string poly1;
std::string poly2;
std::string sign;
getline(in, poly1, ' ');
getline(in, sign, ' ');
getline(in, poly2, '\n');
while (!in.fail())
{
Polynomial p;
Polynomial q;
std::stringstream ss1(poly1);
std::stringstream ss2(poly2);
readPoly(p,q,ss1,ss2);
if (!operate(p,q,sign,out))
{
return EXIT_FAILURE;
}
getline(in, poly1, ' ');
getline(in, sign, ' ');
getline(in, poly2, '\n');
}
}
else if (argc == 4) //Executable poly1 sign poly2
{
std::string poly1 = argv[1];
std::string poly2 = argv[3];
std::string sign = argv[2];
Polynomial p;
Polynomial q;
std::stringstream ss1(poly1);
std::stringstream ss2(poly2);
readPoly(p,q,ss1,ss2);
if (!operate(p,q,sign,std::cout))
{
return EXIT_FAILURE;
}
}
else
{
std::cout << "Error: Too Many Arguments";
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
void readPoly(Polynomial &p, Polynomial &q, std::stringstream &ss1, std::stringstream &ss2)
{
std::string term;
std::string power;
getline(ss1, term, ',');
getline(ss1, power, ',');
while (!ss1.fail())
{
p.insert_term(Term(stod(term), stoi(power)));
getline(ss1, term, ',');
getline(ss1, power, ',');
}
term = "";
power = "";
getline(ss2, term, ',');
getline(ss2, power, ',');
while (!ss2.fail())
{
q.insert_term(Term(stod(term), stoi(power)));
getline(ss2, term, ',');
getline(ss2, power, ',');
}
}
bool operate(Polynomial p, Polynomial q, std::string sign, std::ostream &out) //Does specified calculation, will return false if exeception is thrown
{
if (sign == "+")
{
out << p << " " << sign << " " << q << " = ";
out << p + q << '\n';
}
else if (sign == "-")
{
out << p << " " << sign << " " << q << " = ";
out << p - q << '\n';
}
else if (sign == "*")
{
out << p << " " << sign << " " << q << " = ";
out << p * q << '\n';
}
else if (sign == "/")
{
out << p << " " << sign << " " << q << " = ";
try
{
out << p / q << '\n';
}
catch (PrecondViolatedExcept e)
{
out << "\nError: Negative Power in Division";
return false;
}
}
else if (sign == "%")
{
out << p << " " << sign << " " << q << " = ";
try
{
out << p % q << '\n';
}
catch (PrecondViolatedExcept e)
{
out << "\nError: Negative Power in Modulus";
return false;
}
}
return true;
}