Defining preprocessor directives gives unknown identifier while compilation [duplicate]

Question

I am using the following macro definition in my C program, however, after compilation, it is giving me error that macro names should be identifier. Can anybody tell me what mistake I am doing while defining macro?

#include <stdio.h> #include <stdlib.h> #define a0 0 #define x1 1 #define a1 2 #define x0 3 #define x0a1 4 #define b0 5 #define b1 6 #define y0 7 #define y1 8 #define y0b1 9 #define c0 10 #define z1 11 #define c1 12 #define b1 13 #define z0 14 #define 1R0 0 #define 1B0 1 #define 1W0 2 #define 2R0 3 #define 2B0 4 #define 2W0 5 #define 3R0 6 #define 3B0 7 #define 3W0 8 #define Running 0 #define Blocked 1 #define Waiting 2

Even the Stackoverflow C syntax colorizer knows that macro identifiers can't start with a digit... Just look at what you provided: proper identifiers are black or blue when capitalized, those starting with digits are red. — Jens
– Jens, Commented Nov 25, 2017 at 18:50

Jens Gustedt · Accepted Answer · 2017-11-25 19:40:21Z

0

#define 2R0 3

Identifiers must start with either a letter or underscore, digits are not allowed.

edited Nov 25, 2017 at 19:40

Jens Gustedt

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answered Nov 25, 2017 at 19:34

SoronelHaetir

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