#include #include #include using namespace std; /* Conclusion: (run first) - Unsigned values are stored like usual binary numbers. - The first bit of signed values determines if the number is positive or negative. As long the number is positive, signed numbers behave just like unsigned ones. In case the number is negative the value is calculated by subtracting 128 from all the bits following first one or in other words the first bit simply counts as negative value (whereas the others remain positive). */ // I will probably add other codes about other data types in the new few days. So if you want to see more hit the like button :) int main() { unsigned char u = 0; // a unsigned 8-bit integer signed char s = 0; // a signed 8-bit integer cout << "Let's compare signed and unsigned integers:" << endl << endl; cout << " BIN DEC" << endl; cout << "unsigned: " << bitset<8>(u) << " " << (int)u << endl; cout << "signed: " << bitset<8>(s) << " " << (int)s << endl << endl; u = s = -1; cout << "unsigned: " << bitset<8>(u) << " " << (int)u << endl; cout << "signed: " << bitset<8>(s) << " " << (int)s << endl << endl; u = s = 127; cout << "unsigned: " << bitset<8>(u) << " " << (int)u << endl; cout << "signed: " << bitset<8>(s) << " " << (int)s << endl << endl; u = s = 128; cout << "unsigned: " << bitset<8>(u) << " " << (int)u << endl; cout << "signed: " << bitset<8>(s) << " " << (int)s << endl << endl; u = s = -127; cout << "unsigned: " << bitset<8>(u) << " " << (int)u << endl; cout << "signed: " << bitset<8>(s) << " " << (int)s << endl << endl; cout << "Conclusion can be found in the code!"; return 0; }

How variables are stored (Part 1)