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polykov.fedor/T3 #335

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238 changes: 238 additions & 0 deletions polykov.fedor/T3/main.cpp
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Original file line number Diff line number Diff line change
@@ -0,0 +1,238 @@
#include "polygon_commands.h"
#include <fstream>
#include <iomanip>
#include <sstream>
#include <stdexcept>
#include <string>

using namespace std::placeholders;

int main(int argc, char* argv[])
{
if (argc != 2)
{
std::cerr << "Usage: " << argv[0] << " <filename>\n";
return 1;
}

std::ifstream file(argv[1]);
if (!file)
{
std::cerr << "Error: cannot open file " << argv[1] << '\n';
return 1;
}

std::vector<Polygon> polygons;
std::string line;
while (std::getline(file, line))
{
std::istringstream iss(line);
Polygon temp;
if (iss >> temp)
{
iss >> std::ws;
if (iss.eof())
{
polygons.push_back(std::move(temp));
}
}
}

while (std::getline(std::cin, line))
{
if (line.empty())
continue;

std::istringstream iss(line);
std::string command;
if (!(iss >> command))
continue;

try
{
if (command == "AREA")
{
std::string arg;
if (!(iss >> arg))
throw std::invalid_argument("");

std::string extra;
if (iss >> extra)
throw std::invalid_argument("");

std::cout << std::fixed << std::setprecision(1);

if (arg == "EVEN")
{
double sum = std::accumulate(polygons.begin(), polygons.end(),
0.0, SumAreaIfEven());
std::cout << sum << '\n';
}
else if (arg == "ODD")
{
double sum = std::accumulate(polygons.begin(), polygons.end(),
0.0, SumAreaIfOdd());
std::cout << sum << '\n';
}
else if (arg == "MEAN")
{
if (polygons.empty())
throw std::invalid_argument("");
double sum = std::accumulate(polygons.begin(), polygons.end(),
0.0, SumArea());
std::cout << sum / polygons.size() << '\n';
}
else
{
std::size_t pos = 0;
std::size_t n = std::stoull(arg, &pos);
if (pos != arg.size())
throw std::invalid_argument("");
double sum = std::accumulate(polygons.begin(), polygons.end(),
0.0, SumAreaByVertexes(n));
std::cout << sum << '\n';
}
}
else if (command == "MAX")
{
if (polygons.empty())
throw std::invalid_argument("");

std::string arg;
if (!(iss >> arg))
throw std::invalid_argument("");

std::string extra;
if (iss >> extra)
throw std::invalid_argument("");

if (arg == "AREA")
{
auto it = std::max_element(polygons.begin(), polygons.end(),
CompareByArea());
std::cout << std::fixed << std::setprecision(1)
<< getArea(*it) << '\n';
}
else if (arg == "VERTEXES")
{
auto comp = std::bind(std::less<size_t>(),
std::bind(&std::vector<Point>::size,
std::bind(&Polygon::points, _1)),
std::bind(&std::vector<Point>::size,
std::bind(&Polygon::points, _2)));
auto it = std::max_element(polygons.begin(), polygons.end(), comp);
std::cout << std::defaultfloat;
std::cout << it->points.size() << '\n';
}
else
{
throw std::invalid_argument("");
}
}
else if (command == "MIN")
{
if (polygons.empty())
throw std::invalid_argument("");

std::string arg;
if (!(iss >> arg))
throw std::invalid_argument("");

std::string extra;
if (iss >> extra)
throw std::invalid_argument("");

if (arg == "AREA")
{
auto it = std::min_element(polygons.begin(), polygons.end(),
CompareByArea());
std::cout << std::fixed << std::setprecision(1)
<< getArea(*it) << '\n';
}
else if (arg == "VERTEXES")
{
auto comp = std::bind(std::less<size_t>(),
std::bind(&std::vector<Point>::size,
std::bind(&Polygon::points, _1)),
std::bind(&std::vector<Point>::size,
std::bind(&Polygon::points, _2)));
auto it = std::min_element(polygons.begin(), polygons.end(), comp);
std::cout << std::defaultfloat;
std::cout << it->points.size() << '\n';
}
else
{
throw std::invalid_argument("");
}
}
else if (command == "COUNT")
{
std::string arg;
if (!(iss >> arg))
throw std::invalid_argument("");

std::string extra;
if (iss >> extra)
throw std::invalid_argument("");

if (arg == "EVEN" || arg == "ODD")
{
int count = std::count_if(polygons.begin(), polygons.end(),
CountIfEvenOrOdd(arg));
std::cout << std::defaultfloat;
std::cout << count << '\n';
}
else
{
std::size_t pos = 0;
std::size_t n = std::stoull(arg, &pos);
if (pos != arg.size())
throw std::invalid_argument("");
auto pred = std::bind(std::equal_to<size_t>(),
std::bind(&std::vector<Point>::size,
std::bind(&Polygon::points, _1)),
n);
int count = std::count_if(polygons.begin(), polygons.end(), pred);
std::cout << std::defaultfloat;
std::cout << count << '\n';
}
}
else if (command == "PERMS")
{
Polygon sample;
if (!(iss >> sample))
throw std::invalid_argument("");

std::string extra;
if (iss >> extra)
throw std::invalid_argument("");

int count = std::count_if(polygons.begin(), polygons.end(),
IsPermutationOf(sample));
std::cout << std::defaultfloat;
std::cout << count << '\n';
}
else if (command == "RIGHTSHAPES")
{
std::string extra;
if (iss >> extra)
throw std::invalid_argument("");

int count = std::count_if(polygons.begin(), polygons.end(),
HasRightAngle());
std::cout << std::defaultfloat;
std::cout << count << '\n';
}
else
{
throw std::invalid_argument("");
}
}
catch (...)
{
std::cout << "<INVALID COMMAND>\n";
}
}

return 0;
}
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