/* Code name: Decimal to Binari and Hex converter * By : Babak Sheykhan (Pers) * Date : Aug 1, 2017 * * Description: A simple base converter from Dec to Bin * and capable to handle NEGATIVE decimals to produce * 2's complement * ///////////////////////////////////////////////// * Change log #1 (v.0.02) - Aug 2, 2017 * * 1. Converting to Hexadecimal added * 2. Solve some minor bugs * * ///////////////////////////////////////////////// * Change log #2 (v.0.03) - Aug 29, 2017 * [** Special thanks to my mentor JPM7 for his guidance and positive feedbacks **] * * 1. Optimizing the code using bitwise and shift operator. * 2. Easier to read binary in output * */ #include #include #include #include // CHAR_BIT using std::cout; using std::cin; using std::endl; // Prototypes bool isDec(long long d); void converter(long long d, std::vector &vHex); int main() { cout << "NOTE: Numbers greater than 9,223,372,036,854,775,807 and\n" " less than -9,223,372,036,854,775,807 are Invalid.\n\n"; /*---- Hex Memory ----*/ std::vector memHex(16, 0); /*---- Holds Decimal ----*/ long long dec = 0; /**** Input eval loop ****/ do { cout << "Enter a positive or negative decimal number: "; cin >> dec; } while (!isDec(dec)); cout << "\nConverting to binary and hexadecimal...\n\n"; cout << dec << " = \n"; converter(dec, memHex); } bool isDec(long long d) { /**** Error Handling ****/ // Handling Non-numeric and too long input if (std::cin.fail()) { std::cin.clear(); std::cin.ignore(200, '\n'); cout << "Invalid input!\n"; return false; } else return true; } void converter(long long d, std::vector &vHex) { //if (d < 0) ~d; // ! DUMB MISTAKE ! std::string lookupHex = "0123456789ABCDEF"; short lookupPow[] = {8, 4, 2, 1}; const int Shift = CHAR_BIT * sizeof(long long); const long long Mask = 1LL << (Shift - 1); int x = 0; // index of vHex for (int i = 1; i <= Shift; ++i) { cout << (d & Mask ? 1 : 0); vHex[x] += lookupPow[(i-1)%4] * (d & Mask ? 1 : 0); if (i % 4 == 0) { ++x; cout << " "; if (i % 32 == 0) cout << endl; } d <<= 1; } cout << endl; for (size_t j = 0; j < vHex.size(); ++j) cout << lookupHex[vHex[j]]; cout << endl; }

+/- Decimal to Binary and Hex converter v.0.03