File content as of revision 1:4d725d785ea6:

/*
  Project: ForLoopIteration2
  File: main.cpp
 
 Demonstrates the use of a for() loop. Lights multiple LEDs in sequence, then
 in reverse. Uses alternative approach to that used in ForLoopIteration.
 
 The circuit:
 
    Bargraph LEDs from pins 2 through 11 to ground via 330 Ohm resistors.
 
 Created 2006
 by David A. Mellis
 Modified 30 Aug 2011
 by Tom Igoe
 Modified for Nucleo / mbed 12 Aug 2017
 by Sheila Ross
 Modified by C. S. Tritt 9/21/17 (v. 1.0)
 
This example code is in the public domain.
*/
 
#include "mbed.h"
 
float delay = 0.1; // Seconds, the higher the number, the slower the rate.
 
BusOut bar_graph(D2,D3,D4,D5,D6,D7,D8,D9,D10,D11);
 
int main() {
  
    while(true) { // Keep the lights going back and forth forever.
 
        // Shift bar from 0 to 9 places. 1 << 9 is 2 to the 10th power.
        for(int lights = 1; lights <= (1<<9); lights = (lights << 1)) {
            bar_graph = lights; // Shifting rather than incrementing in for.
            wait(delay); // Pause
        }

        // Now shift down from 9 to 0 places.
        for(int lights = (1<<9); lights >= 1; lights = (lights >> 1)) {
            bar_graph = lights; // Shifting rather than incrementing in for.
            wait(delay); // Pause
        }
    }
}