Arduino read/write AT24C256

#include <Wire.h>
#define eeprom 0x50  //defines the base address of the EEPROM
void setup() {
  Wire.begin();  //creates a Wire object
  Serial.begin(9600);
  unsigned int address = 0;  //first address of the EEPROM
  // Serial.println("We write the zip code 22222, a zip code");
  // for (address = 0; address < 5; address++)
  //   writeEEPROM(eeprom, address, '2');  // Writes 22222 to the EEPROM
  // for (address = 0; address < 5; address++) {
  //   Serial.print(readEEPROM(eeprom, address), HEX);
  // }

   writeEEPROM(eeprom, address, 0x19);
   Serial.print(readEEPROM(eeprom, address), HEX);
}
void loop() {
  /*there's nothing in the loop() function because we don't want the arduino to 
  repeatedly write the same thing to the EEPROM over and over. 
  We just want a one-time write, so the loop() function is avoided with EEPROMs.*/
}
//defines the writeEEPROM function
void writeEEPROM(int deviceaddress, unsigned int eeaddress, byte data) {
  Wire.beginTransmission(deviceaddress);
  Wire.write((int)(eeaddress >> 8));    //writes the MSB
  Wire.write((int)(eeaddress & 0xFF));  //writes the LSB
  Wire.write(data);
  Wire.endTransmission();
  delay(100);
}
//defines the readEEPROM function
byte readEEPROM(int deviceaddress, unsigned int eeaddress) {
  byte rdata = 0xFF;
  Wire.beginTransmission(deviceaddress);
  Wire.write((int)(eeaddress >> 8));    //writes the MSB
  Wire.write((int)(eeaddress & 0xFF));  //writes the LSB
  Wire.endTransmission();
  Wire.requestFrom(deviceaddress, 1);
  if (Wire.available())
    rdata = Wire.read();
  delay(100);
  return rdata;
}