File content as of revision 20:0b2279011691:

//#include "mbed.h"
//#include <time.h>
//#include <string>
//#include <iostream>
// 
//Serial pc(USBTX, USBRX); // tx, rx                                          //defines the communication between MBed and pc
//DigitalIn sensor1(p8);                                                        //input from diode. Digital 1 is beam unbroken?
//DigitalIn sensor2(p9);  
//DigitalIn sensor3(p10);  
//DigitalIn sensor4(p11);  
//DigitalOut led(LED1);    
//                                                   //testing purposes 
//int calculate()
//{
//
//    pc.printf("new program \n");                                            //alert user of initialisation   
//      
//    time_t sensor1_time ;
//    time_t sensor2_time ; 
//    time_t sensor3_time ;
//    double sensor2Seconds; 
//    double sensor3Seconds;
//     
//     //  while(!sensor4)                                                      //until last sensor because that will be when its over.     
//      // {                                      
//        if (sensor1)                                                          //checks the digital input from the diode.
//        {
//         
//            led = 1;
//            sensor1_time = time(NULL);
//        }
//           if (sensor2)                                                          //checks the digital input from the diode.
//        {
//           
//            led = 1;
//            sensor2_time = time(NULL);
//            sensor2Seconds = difftime(sensor2_time, sensor1_time);
//            pc.printf(" 2nd time  %d : \t", sensor2Seconds);
//        }
//        if (sensor3)                                                          //checks the digital input from the diode.
//        {
//           
//            led = 1;
//              sensor3_time  = time(NULL);
//              sensor3Seconds  = difftime(sensor3_time, sensor2_time);
//              pc.printf("3rd time  %d : \t", sensor3Seconds );
//        }
//       
//  //     }
//}