Thermistor.c

#include <math.h>
double celsius = 0;

double Thermistor(int RawADC) {
 double Temp;
 Temp = log(10000.0*((1024.0/RawADC-1)));
 Temp = 1 / (0.001129148 + (0.000234125 + (0.0000000876741 * Temp * Temp ))* Temp );
 return Temp;
}

void setup() {
 Serial.begin(9600);
}

void loop() {
 celsius = Thermistor(analogRead(1));  // display celsius
 Serial.print(celsius);
 Serial.println("*C");
 delay(1000);
}