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#include <iostream>
#include <locale>
#include <clocale>
#include <cwchar>
#include <cmath>
class index {
char narrow_str[20] = {};
wchar_t warr[10];
public:
index(const char * znakUTF8) {
for (int i = 0; i < 18 && i < sizeof(znakUTF8); i++) narrow_str[i] = znakUTF8[i];
std::setlocale(LC_ALL, "en_US.UTF-8");
std::swprintf(warr, sizeof warr / sizeof * warr, L"%s", narrow_str);
std::wcout.imbue(std::locale("C.UTF-8"));
}
wchar_t * get() {
return warr;
}
};
int main() {
index ix("\u00B2");
std::wcout << L"Podaj fajną liczbę : ";
int n = 6817;
std::wcin >> n;
for (int i = 1, j = sqrt(n); i <= j;) {
int sqn = j * j + i * i;
if (sqn > n) j--;
else if (sqn < n) i++;
else {
std::wcout << index("\u2603").get() << " " << n << "=" << i << ix.get() << "+" << j << ix.get() << '\n' << std::flush;
i++;
}
}
return 0;
}
//https://en.cppreference.com/w/cpp/locale/setlocale
//https://en.cppreference.com/w/cpp/io/c/fwprintf
