error " macro names must be identifiers"

[Skydownbr]

code:
volatile*boolean*TurnDetected;**//*need*volatile *
for *Interrupts
volatile*boolean*up;]
const*int*PinCLK = 2;*** //*Generating*interrupts*us ing*CLK*signal
const*int*PinDT = 3;**** //*Reading*DT*signal
const*int*PinSW = 4;**** //*Reading*Push*Button*swit ch *

//*L9110*connections
#define*L9110_B_IA*10*//*Pin*D10***>*Motor*B*Input*A
#define*L9110_B_IB*11*//*Pin*D11***>*Motor*B*Input*B *

//*Motor*Speed*&*Direction
#define*MOTOR_B_PWM*L9110_B_IA*//*Motor*PWM*Speed
#define*MOTOR_B_DIR*L9110_B_IB //*Motor*Direction *

//*Interrupt*routine*runs*if*CLK*goes*from*HIGH*t o*LOW
void*isr*()*

[weaknessforcats]

You can't use a keyword from the C/C++ language as an identifier.

The * is part of C/C++.

[donbock]

Presumably a lot of the asterisks in your code listing are actually spaces. I suppose you changed the spaces to asterisks to unambiguously indicate where the spaces are. That actually makes your code impossible to read. Please put back the spaces.

Please use CODE tags when you provide code listings.