File content as of revision 0:a6003d0979bf:

#include "mbed.h"
// Lab 3
// This program explores the basic capabilites of the digital I/O on the processor
// Written by: MIDN 3/C N. Weinhardt, MIDN 3/C J. Kangwijaya, 09/22/14
//Modified:
//          9/23/14 MIDN 3/C. Weinhardt. Corrected last if else statement.
BusOut zed(p5, p6, p7, p8, p11); //data bus for LEDs
DigitalIn sw4(p16);              // switch for control of LEDs
DigitalIn sw5 (p17);             // switch for control of LEDs
int  w1;                         // variable to store switch 4
int w2;                          // variable to store switch 5
main()
{
    int x;                      // variable to store binary input
    w1=sw5;                     // variable to store switch 5
    w2=sw4;                     // variable to store switch 4
    x=4;                        // displays 0b0100 on LEDs
    zed=x;                      // read switch into variable
    while(1) {                  // infinite while loop

        if(w1==1 && w2==1) {    // if sw5 and sw4 are on
            x=4;                // displays 0b0100 on LEDs
            zed=x;              // read switch into variable

        } else if (w1==1 &&w2==0) {  // if sw5 is on and sw4 is off
            x=x/2;                   // x equals the variable divided by 2 to be displayed on the LEDs
            zed=x;                   // read switch into variable
            wait(0.5);               // change the value every 0.5 seconds
        } else if (w1==0 && w2==1) { // if sw5 is off and sw4 is on
            x=x*2;                   // x equals the variable multiplied by 2 to be displayed on the LEDs
            zed=x;                   // read switch into variable
            wait(0.5);               // change the value every 0.5 seconds
        }
    }

}