void setup()
{
  Serial.begin(9600);
  const char src[12] = "Kashifjaved";
  char dest[12];
  strcpy(dest, "Heloooo!!");
  Serial.print("Before memcpy dest = ");
  Serial.println(dest);
  memcpy(dest, src, strlen(src) + 1);
  Serial.print("After memcpy dest = ");
  Serial.println(dest);
}

void loop()
{
}