As in C, GPC requires instructions to be terminated with a semicolon at the end of each statement. However, the closing tag of a block code automatically implies a semicolon, so a semicolon is not need to terminating the last line of a GPC block.

main

{

set_val(XB1_A, 75);

x = y * ( z + 1 )

}

2. Block Statement

A group of statements which are bonded together to form a logic are called block statements. Block statement begins with a { and ends with a }.

main {

if( a <= 120 ) {

z = a + 10;

{

b = a + 20;

c = b / z;

}

3. Defines

Defines a named constant at compile time. Defines MUST be defined before the main procedure.

define <name> = <value>;

- <name>: The name of the constant.

- <value>: The value of the constant; only scalar values are allowed.

define MODE_OFF = 0;

define MODE_A = 1, RFA_TIME = 20;

int mode = MODE_OFF;

main {

if(mode == MODE_A) mode = MODE_OFF;

}

4. Comments

GPC supports C style comments. For example:

main

{

block(PS4_START, 200); // This is a one-line C style comment

/* This is a multi-line comment

yet another line of comment */

set_val(PS4_GYROY, 45);

}

The "one-line" comment style only comment to the end of the line. Multi-line style comments end at the first */ encountered. Make sure you don't nest C style comments. It is easy to make this mistake if you are trying to comment out a large block of code.

main

{

set_val(XB1_RT, 45); /* This comment will cause a problem */

}