9.1 Conditional statements
---------------------------
Conditional statements used for branching are the same as in C.
C-- has two branching statements, 'if' and 'IF'.
'if' makes a near conditional jumps, while 'IF' makes a short (8-bit)
conditional jump. 'IF' is faster and can save up to 3 bytes of code, but
can do jumps only in 127 bytes of code.
Conditional statements, as in C, can be accompanied by a single command
or a block of several commands found in braces { }. Conditional statements
have the same restrictions as conditional expressions.
If an 'IF' statment is followed by more than 127 bytes of code, the
translator produces the following error message:
This may be corrected by simply replacing 'IF' with 'if'.
The commands 'else' and 'ELSE' are used as in C, except that 'ELSE' has
a jump address limit of 127 bytes, like 'IF'. 'else' generates code 1 byte
longer than 'ELSE'.
You can freely combine 'IF' and 'else' or 'if' and 'ELSE' as in the
following example:
if( x == 2 )
WRITESTR("Two");
ELSE{ WRITESTR("not two.");
printmorestuff();
}
If 'ELSE' is followed by more than 127 bytes of code the following
error message will be generated:
ELSE jump distance too far, use else.
This can be corrected by simply replacing 'ELSE' with 'else'.