Материал из C\C++ эксперт
cin Handles unsigned int Data Types
#include <iostream>
using namespace std;
int main()
{
int myInt;
long myLong;
double myDouble;
float myFloat;
unsigned int myUnsigned;
cout << "Int: ";
cin >> myInt;
cout << "Long: ";
cin >> myLong;
cout << "Double: ";
cin >> myDouble;
cout << "Float: ";
cin >> myFloat;
cout << "Unsigned: ";
cin >> myUnsigned;
cout << "\n\nInt:\t" << myInt << endl;
cout << "Long:\t" << myLong << endl;
cout << "Double:\t" << myDouble << endl;
cout << "Float:\t" << myFloat << endl;
cout << "Unsigned:\t" << myUnsigned << endl;
return 0;
}Demonstrates arithmetic operations with unsigned int variables
#include <iostream>
using namespace std;
int main()
{
unsigned int score = 5000;
cout << "score: " << score << endl;
score = score + 100;
cout << "score: " << score << endl;
//combined assignment operator
score += 100;
cout << "score: " << score << endl;
//increment operators
int lives = 3;
++lives;
cout << "lives: " << lives << endl;
lives = 3;
lives++;
cout << "lives: " << lives << endl;
lives = 3;
int bonus = ++lives * 10;
cout << "lives, bonus = " << lives << ", " << bonus << endl;
lives = 3;
bonus = lives++ * 10;
cout << "lives, bonus = " << lives << ", " << bonus << endl;
//integer wrap around
score = 4294967295;
cout << "\nscore: " << score << endl;
++score;
cout << "score: " << score << endl;
return 0;
}Difference between signed and unsigned integers
#include <iostream>
using namespace std;
int main()
{
short int i; // a signed short integer
short unsigned int j; // an unsigned short integer
j = 60000;
i = j;
cout << i << " " << j;
return 0;
}-5536 60000"
Tests signed and unsigned integers
#include <iostream>
using namespace std;
int main(){
int intVar = 1500000000;
intVar = (intVar * 10) / 10;
cout << "intVar = " << intVar << endl;
intVar = 1500000000;
intVar = (static_cast<double>(intVar) * 10) / 10;
cout << "intVar = " << intVar << endl;
return 0;
}unsigned int and unsigned long
#include <iostream>
using namespace std;
int main() {
unsigned int numb;
unsigned long fact=1;
cout << "Enter a number: ";
cin >> numb;
for(int j=numb; j>0; j--)
fact *= j;
cout << "Factorial is " << fact << endl;
return 0;
}unsigned int: Subtraction and Integer Overflow
#include <iostream>
int main()
{
using std::cout;
using std::endl;
unsigned int difference;
unsigned int bigNumber = 100;
unsigned int smallNumber = 50;
difference = bigNumber - smallNumber;
cout << "Difference is: " << difference;
difference = smallNumber - bigNumber;
cout << "\nNow difference is: " << difference <<endl;
return 0;
}
