{

//--- Initializations ---

QCoreApplication a(argc, argv);

char myoutput [60];

int stringlength,

x = 4,

y = 10,

c1 = 'A',

c2 = 'B',

c3 = 'C',

nl = '\n';

string username,

nickname;

char favchar1,

favchar2,

favchar3;

string myinput;

float price = 0;

int amount = 0;

//--- Output demonstration ---

// string output with C function

printf("Hello, World!\n");

// string output with C++ stream functions

cout << "Hello Universe!" << endl << endl;

// formatted output

stringlength = sprintf(myoutput, "%d plus %d equals %d", x, y, x+y);

printf ("[%s] is a string that is %d characters long.\n\n", myoutput, stringlength);

// single character output

putc(c1, stdout);

putc(c2, stdout);

putc(c3, stdout);

putc(nl, stdout);

//--- Input demonstration ---

// string input

cout << endl << "Please enter your username: ";

getline(cin, username);

cout << "Hello " << username << endl;

cout << "What is your nickname? ";

cin >> nickname;

cout << endl << "So, " << username << " is called " << nickname << "?" << endl;

cout << "Ok..." << endl;

// single character input

cout << endl << "What is your favorite character? ";

cin >> favchar1;

fflush(stdin);

cout << "And what is your second favorite character? ";

favchar2 = getc(stdin);

fflush(stdin);

cout << "And the third favorite character? ";

favchar3 = getchar();

cout << endl << "Your favorite characters are " << favchar1;

cout << ", " << favchar2 << " and " << favchar3 << endl;

// stringstream example

fflush(stdin);

cout << endl << "Sell your apples..." << endl;

cout << "Please enter your price per apple: ";

getline(cin, myinput);

stringstream(myinput) >> price;

cout << "How many apples do you want to sell? ";

getline(cin, myinput);

stringstream(myinput) >> amount;

cout << "If you sell all of them, you will earn: " << price*amount << endl;

// end of application

cout << endl << "That's it!" << endl;

return a.exec();