int main(void)
{
        void IO_Port_config();
       
        while(1)
        {
               
                if        (GPIO_ReadInputDataBit(GPIOG, PGin(0))==0)
                {
                        while(GPIO_ReadInputDataBit(GPIOG,PGin(0))==0);
                        return PBout(9)=0;
                }

               
        }
}
出现以下错误：
..Usermain.c(20): warning:  #223-D: function "BIT_ADDR" declared implicitly
..Usermain.c(20): warning:  #174-D: expression has no effect
..Usermain.c(21): error:  #18: expected a ")"
..Usermain.c(66): warning:  #1-D: last line of file ends without a newline
..Usermain.c(66): warning: At end of source:  #12-D: parsing restarts here after previous syntax error
..Usermain.c(66): error: At end of source:  #29: expected an expression
..Usermain.c(66): error: At end of source:  #65: expected a ";"
  ..Usermain.c(66): error: At end of source:  #67: expected a "}"
..Usermain.c(66): error: At end of source:  #67: expected a "}"