File content as of revision 3:0170897aa173:

#include "mbed.h"
#include "math.h"

Serial pc(USBTX,USBRX);
DigitalOut Led1(LED1);
DigitalOut Led2(LED2);
DigitalOut Led3(LED3);
DigitalOut Led4(LED4);
AnalogIn therm(p19);
AnalogIn light(p20);


float volt_raw; //raw data read from thermistor
float volt; //final voltage after conversion
float temp; //converted temperature in degrees celsius
float light_volt; //light voltage multiplied by 3.3 from mbed
float light_res; //resistance through photocell
float light_volt_raw; //raw voltage through photocell


int main()
{
    while(1) {
        volt_raw = therm.read(); //sets the raw data as a variable
        volt = volt_raw*3.3; //converts raw voltage to the correct scale
        float temp = (-1481.96)+ sqrt((2.1962*(powf(10,6)))+((1.8639-volt)/(3.88*(powf(10,-6))))); //converts voltage to temperature
        pc.printf("Thermocell Voltage: %f V\r\n",volt);
        pc.printf("Temperature: %f C\r\n",temp);

        if (temp>=15 && temp<20) {
            Led1=1;
        }
        if (temp<15 && temp>=20) {
            Led2=1;
        }
        if (temp>=25) {
            Led3=1;
        }


        light_volt_raw=light.read(); //sets the raw data as a variable
        light_res=(10000/light_volt_raw)-10000;
        light_volt=light_volt_raw*3.3;
        pc.printf("Photocell Resistance: %f Ohms\r\n",light_res);
        pc.printf("Photocell Voltage: %f \r\n",light_volt);
        if (light_volt<1.55) { //the sensor is "completely blocked" by a finger at most values under 0.3 volts
            Led4=1;
        }
        if (light_volt>1.55) {
            Led4=0;
        }
    }
}