Jon Fuge
Simple training demonstration to show the use of union and structure
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OddExample1
by 
Jon Fuge
Diff: main.cpp
- Revision:
- 6:5f4be4b8db14
- Parent:
- 5:eb5c6ae5938b
- Child:
- 7:4753526f342a
--- a/main.cpp Tue Nov 26 11:18:11 2013 +0000
+++ b/main.cpp Tue Nov 26 11:39:57 2013 +0000
@@ -1,5 +1,5 @@
/*******************************************************************************
-* This program demonstrates the use of pointers *
+* This program demonstrates the use of structures *
* *
* Jon Fuge *
* V1.0 25/11/2013 First issue of code *
@@ -10,21 +10,22 @@
USBSerial serial; // Virtual serial port over USB. Use Teraterm as the interface
+struct coordXY { int iX; int iY; }; // Define a new structure
+
int main() {
- char cBox1 = 5;
- char cBox2 = 10; // Declare two variables.
- char *ptr = &cBox1; // Declare a pointer directed to cBox1
+ coordXY Position1, Position2; // Declare variables with the new structure
- wait (10); // Wait 10 seconds to connect port
-
- serial.printf("cBox1:%i, cBox2:%i, *ptr:%i\n\r", cBox1, cBox2, *ptr);
+ wait (10); // Wait 10 seconds to connect port
- cBox2 = cBox1; // cBox2 was 10, but is now 5
- serial.printf("cBox1:%i, cBox2:%i, *ptr:%i\n\r", cBox1, cBox2, *ptr);
-
- cBox1 = 15; // cBox1 was 5, but is now 15
- serial.printf("cBox1:%i, cBox2:%i, *ptr:%i\n\r", cBox1, cBox2, *ptr);
- // cBox2 will still report 5, but *ptr now reports 15
+ Position1.iX = 1; // Sets Position1.iX only
+ Position1.iY = 2; // Sets Position1.iY only
+ Position2.iX = 9; // Sets Position2.iX only
+ Position2.iY = 6; // Sets Position2.iY only
- for(;;) {} // Loop forever
+ serial.printf("Position1.iX:%i, Position1.iY:%i\n\r", Position1.iX, Position1.iY);
+
+ Position1 = Position2; // Directly load Position1 from Position2
+ serial.printf("Position1.iX:%i, Position1.iY:%i\n\r", Position1.iX, Position1.iY);
+
+ for(;;) {} // Loop forever
}
\ No newline at end of file