Denso RC5 Specifications download pdf (Page 545)

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Chapter 20 Preprocessor

20-1

20.1 Symbol Constants · Macro Definitions

#define (Preprocessor Statement)

Function

Replaces a designated constant or macro name in the program with a

designated character string.

Format

#define <Symbol constant> <Character string>

#define <Macro name (Argument)> <Argument included character string>

Explanation

This statement replaces <Symbol constant> or <Macro name> in the program

with a designated character string. In the case of a macro name, it is replaced

with the arguments already included.

<Symbol constant> or character strings of <Macro name> in “ ” (double

quotations) are not replaced.

You must describe the #define statement on one line.

You must place 1 or more space characters between <Symbol constant> and

<Character string>.

Do not place a space between a macro name and the parentheses of an

argument.

You can redefine <Symbol constant> and <Macro name>, however, you need

to make them invalid with #undef at least once. The most recently defined

ones become valid.

<Symbol constant> and <Macro name> must be within 64 characters.

You can use a maximum of 2048 macro names in one program. There is no

limitation to the number of macro function arguments you may use.

Related Terms

#undef

Example

#DEFINE NAME “Denso Corporation”

'Assigns “Denso Corporation” to the symbol constant NAME.

#DEFINE mAREA(radius) PI * POW(radius, 2)

'Declares mAREA(radius) as a macro function.

S1 = NAME 'Assigns “Denso Corporation” to S1.

D1 = mAREA(10) 'Assigns the calculation value of PI*POW(10,2) to D1.

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