// Done by Babak Sheykhan // Useful for memorizing all possible combinations of hex digits from 0x0A (10) to 0x1E (30) #include #include #include using namespace std; #define HEX uppercase << hex int main() { vector firstRecord; vector secondRecord; firstRecord.reserve(16 / 2); secondRecord.reserve(16 / 2); unsigned char from = 0xA, to = 0x1E, width = 3; // 10 to 30 cout << "\t***Hex Addition Cheat Sheet***\n\n"; for (auto current = from; current <= to; ++current) { for (auto firstOperand = current <= 0xF ? current-1 : 0xF; firstOperand >= 1; --firstOperand) { for (auto secondOperand = 1; secondOperand <= current / 2; ++secondOperand) { if (firstOperand + secondOperand == current) { firstRecord.push_back(firstOperand); secondRecord.push_back(secondOperand); break; } } } char zFiller = current > 0xF ? '\0' : '0'; cout << "Combinations that give us " << HEX << zFiller << +current << "H (" << dec << +current << HEX << ")\n\n"; for (const auto &i : firstRecord) cout << setw(width) << " " << +i << "H"; cout << endl; for (const auto &i : secondRecord) cout << setw(width) << "+" << +i << "H"; cout << endl; for (auto i = 0; i < firstRecord.size(); ++i) cout << setw(width) << " ----"; cout << endl; for (auto i = 0; i < firstRecord.size(); ++i) cout << setw(width) << zFiller << +current << "H"; cout << endl << endl; firstRecord.clear(); secondRecord.clear(); } }