DigitalOutClassReference.c

#include "mbed.h"

DigitalOut led1(LED1);	  // Create a DigitalOut connected to the specified pin. 
DigitalOut led2(LED2, 0); // Create a DigitalOut connected to the specified pin and initialize with 0
DigitalOut led3(LED3);
DigitalOut led4(LED4);

int value = 1;

int main(void) {
	led1.write(1);		// Set the output, specified as 0 or 1 (int)
	led2 = 1;		    // DigitalOut & operator= (int value) - A shorthand for write() 
	led3 = value;		// DigitalOut & operator= (int value) - A shorthand for write()	    
	led4 = led3;		// DigitalOut & operator= (DigitalOut &rhs) - A shorthand for write() using the assignment operator which copies the state from the DigitalOut argument.

	if(led2.is_connected ()) {	// Return the output setting, represented as 0 or 1 
    	if(led2.read() )		// Return the output setting, represented as 0 or 1 (int)
	        printf("%d %d\n", led1.read(), led2.read());	
	}	
	if(led2)					// operator int () - A shorthand for read()
	    printf("%d %d\n", led3.read(), led4.read());	

	return 0;
}