id no calificado esperado antes de la constante de cadena

XRPM_COUNTERS.h:15:5: error: expected unqualified-id before string constant ISR(PCINT0_vect) { ^ In file included from C:\Documents and Settings\SAM\Desktop\automation_1_A_NEW_AAA\automation_1_A_NEW_AAA.ino:10:0: XRPM_COUNTERS.h:72:1: error: expected ";" after class definition } ^ sketch\XRPM_COUNTERS.h: In function "void XRPMLoop()": XRPM_COUNTERS.h:77:19: error: "t" was not declared in this scope if ((millis() - t) > 300) rpm = 0; ^ XRPM_COUNTERS.h:77:29: error: "rpm" was not declared in this scope if ((millis() - t) > 300) rpm = 0; ^ XRPM_COUNTERS.h:79:17: error: "ot" was not declared in this scope else if (t != ot) { ^ XRPM_COUNTERS.h:81:5: error: "rpm" was not declared in this scope rpm = 60000.0 / (float)(t - ot); ^ XRPM_COUNTERS.h:87:13: error: "rpm" was not declared in this scope lcd.print(rpm); ^ XRPM_COUNTERS.h:93:14: error: "printVu" was not declared in this scope printVu(rpm); ^ sketch\XRPM_COUNTERS.h: At global scope: XRPM_COUNTERS.h:97:1: error: expected declaration before "}" token }; ^ exit status 1 expected unqualified-id before string constant 

Comentarios

• ¿tiene alguna pregunta? ….. ¿Va a un médico y luego no dice por qué necesita ver a un médico?
• No ha incluido su código real. Como ese ' es el que tiene los errores, debes incluirlo o no ' podremos ayudarte.
• Parece que la definición de clase antes del ISR no ' t terminaba con punto y coma …
• Posible duplicado de error: uso no válido de la función miembro no estática attachInterrupt (0, count, RISING);