#include <LiquidCrystal.h>

byte smiley[8] = {0b00000, 0b00000, 0b01010, 0b00000,
                  0b10001, 0b01110, 0b00000, 0b00000
                };

// initialize the LCD library with the numbers of the interface pins
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

void setup() {
  // set up the LCD's number of columns and rows:
  Serial.begin(9600);
  lcd.begin(16, 2);
  // Print a message to the LCD.
  lcd.print("Sprintf");
  lcd.setCursor(0,1);
  lcd.print("Test");
  delay(1000);
  lcd.clear();
}

void loop() {
  char buffer[32];
  //lcd.clear();
  lcd.createChar(0, smiley);
  lcd.setCursor(0,0);
  sprintf(buffer, "Hello %s%c", "world", lcd.write(byte(0)));
  lcd.print(buffer);
  //lcd.write(byte(0));
  lcd.setCursor(0,1);
  lcd.print("world!");
}