68 lines
1.8 KiB
C++
68 lines
1.8 KiB
C++
#include <stdio.h>
|
|
#include <utility>
|
|
#include <numeric>
|
|
#include <string>
|
|
#include <iostream>
|
|
#include <exception>
|
|
#include <vector>
|
|
|
|
class Error : public std::exception {
|
|
public:
|
|
explicit Error(const std::string& what): _what(what) {}
|
|
explicit Error(const char* what): Error(std::string(what)) {}
|
|
explicit Error(std::string_view what): Error(std::string(what)) {}
|
|
const char* what() const noexcept override { return _what.c_str(); }
|
|
private:
|
|
std::string _what;
|
|
};
|
|
|
|
class ParserException : public Error {
|
|
public:
|
|
using Error::Error;
|
|
};
|
|
|
|
class ReaderException : public Error {
|
|
public:
|
|
using Error::Error;
|
|
};
|
|
|
|
int parse(const std::string& str) {
|
|
if (str.empty()) {
|
|
throw ParserException("String is empty!");
|
|
}
|
|
if (str.size() > 20) {
|
|
throw ParserException("Value is to big to fit in integer!");
|
|
}
|
|
|
|
return std::stoi(str);
|
|
}
|
|
|
|
std::string read(const std::vector<int>& vec) {
|
|
if (vec.empty()) {
|
|
throw ReaderException("Vector is empty, can't read");
|
|
}
|
|
if (vec.size() > 20) {
|
|
throw ReaderException("Vector is to big");
|
|
return "";
|
|
}
|
|
|
|
return std::accumulate(vec.begin(), vec.end(), std::string{}, [](const auto& str, int num){
|
|
if (str.empty()) {
|
|
return std::to_string(num);
|
|
}
|
|
return str + ", " + std::to_string(num);
|
|
});
|
|
}
|
|
|
|
int main() {
|
|
try {
|
|
std::cout << "Parsed number: " << parse("-123") << '\n';
|
|
std::cout << "Read numbers: " << read({1,2,3-1,-2,-3}) << '\n';
|
|
std::cout << "Parsed number: " << parse("123456789012345678901234") << '\n';
|
|
std::cout << "Read numbers: " << read({}) << '\n';
|
|
} catch (const ReaderException& ec) {
|
|
std::cout << "ReaderException: " << ec.what() << '\n';
|
|
} catch (const ParserException& ec) {
|
|
std::cout << "ParserException: " << ec.what() << '\n';
|
|
}
|
|
}
|