Jon Fuge / Mbed 2 deprecated OddExample3

Simple training demonstration to show the use of union and structure

Dependencies:   USBDevice mbed

Fork of OddExample2 by Jon Fuge

main.cpp@5:eb5c6ae5938b, 2013-11-26 (annotated)

Committer:
jf1452
Date:
Tue Nov 26 11:18:11 2013 +0000
Revision:
5:eb5c6ae5938b
Parent:
4:c4e451a1890f
Child:
6:5f4be4b8db14
Pointer Example

Who changed what in which revision?

UserRevisionLine numberNew contents of line
jf1452 1:d9da28105bef 1 /*******************************************************************************
jf1452 5:eb5c6ae5938b 2 * This program demonstrates the use of pointers *
jf1452 1:d9da28105bef 3 * *
jf1452 1:d9da28105bef 4 * Jon Fuge *
jf1452 2:db81cad8cb64 5 * V1.0 25/11/2013 First issue of code *
jf1452 1:d9da28105bef 6 *******************************************************************************/
dan 0:7dec7e9ac085 7
jf1452 2:db81cad8cb64 8 #include "mbed.h"
jf1452 2:db81cad8cb64 9 #include "USBSerial.h"
jf1452 3:0f80147842c2 10
jf1452 3:0f80147842c2 11 USBSerial serial; // Virtual serial port over USB. Use Teraterm as the interface
dan 0:7dec7e9ac085 12
dan 0:7dec7e9ac085 13 int main() {
jf1452 5:eb5c6ae5938b 14 char cBox1 = 5;
jf1452 5:eb5c6ae5938b 15 char cBox2 = 10; // Declare two variables.
jf1452 5:eb5c6ae5938b 16 char *ptr = &cBox1; // Declare a pointer directed to cBox1
jf1452 5:eb5c6ae5938b 17
jf1452 5:eb5c6ae5938b 18 wait (10); // Wait 10 seconds to connect port
jf1452 5:eb5c6ae5938b 19
jf1452 5:eb5c6ae5938b 20 serial.printf("cBox1:%i, cBox2:%i, *ptr:%i\n\r", cBox1, cBox2, *ptr);
jf1452 3:0f80147842c2 21
jf1452 5:eb5c6ae5938b 22 cBox2 = cBox1; // cBox2 was 10, but is now 5
jf1452 5:eb5c6ae5938b 23 serial.printf("cBox1:%i, cBox2:%i, *ptr:%i\n\r", cBox1, cBox2, *ptr);
jf1452 5:eb5c6ae5938b 24
jf1452 5:eb5c6ae5938b 25 cBox1 = 15; // cBox1 was 5, but is now 15
jf1452 5:eb5c6ae5938b 26 serial.printf("cBox1:%i, cBox2:%i, *ptr:%i\n\r", cBox1, cBox2, *ptr);
jf1452 5:eb5c6ae5938b 27 // cBox2 will still report 5, but *ptr now reports 15
jf1452 3:0f80147842c2 28
jf1452 5:eb5c6ae5938b 29 for(;;) {} // Loop forever
jf1452 3:0f80147842c2 30 }