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// g++ -Wall -Wextra -Wpedantic -std=c++17 cpp/ch-1.cpp
#include <cmath> // abs, round, cbrt
#include <iostream>
#include <sstream> // form the error message
#include <vector>
static constexpr double TOLERANCE = 1E-6;
bool fun(int n) {
double cube_root = std::cbrt(n);
return std::abs(cube_root - std::round(cube_root)) < TOLERANCE;
}
int main() {
// Tests
std::vector<std::pair<int, int>> tests = {
{0, true},
{1, true},
{-343, true},
{27, true},
{122, false},
{6, false},
{777, false}
};
for (const auto& [input, expected_output] : tests) {
int got = fun(input);
if (got != expected_output) {
std::stringstream error_msg;
error_msg << "Expected " << expected_output << ", got " << got;
throw std::runtime_error(error_msg.str());
}
}
std::cout << "done-testing, success\n";
}
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