C++

Hello World

• Hello - C++

Объявление переменных

1 int    i, j, k = 10;
2 char   c, ch = 'a';
3 float  f, salary = 4.5f;
4 double d = 100.3;
5 bool busy = true;

Ввод и вывод

1 int age;
2 std::cout << "Please enter your age:";
3 std::cin >> age;
4 std::cout << "Your age = " << age << std::endl;

Условный оператор

 1 int age;
 2 std::cout << "Please enter your age:";
 3 std::cin >> age;
 4 if (age > 65)
 5 {
 6     std::cout << "Here is your pension.";
 7 }
 8 else
 9 {
10     std::cout << "Good morning people!";
11 }

Циклы

 1 std::cout << "while loop" << std::endl;
 2 int i = 1;
 3 while (i < 11)
 4 {
 5     std::cout << i << std::endl;
 6     i++;
 7 }
 8 
 9 std::cout << "do while loop" << std::endl;
10 i = 1;
11 do
12 {
13     std::cout << i << std::endl;
14     i++;
15 } while (i < 11);
16 
17 printf("for loop\n");
18 for (int j = 1; j < 11; j++)
19 {
20     std::cout << j << std::endl;
21 }