Look at the function on line 130;
float getTemperature(int pin) {
It has the required opening brace { , but no closing brace } between the return steinhart at the end of the function and the start of the next function.
steinhart = 1.0 / steinhart;
steinhart -= 273.15;
return steinhart;
void setup()
{
Serial.begin(9600);
sensors.begin();