PIC programming help needed

//on/off funcion

#include <pic.h>
#include <htc.h>

__CONFIG(INTIO & WDTDIS & PWRTEN & MCLRDIS & UNPROTECT & BORDIS);

unsigned int RA0,RA1,RA2,RA3,RB0,RB1,RB2,RB3,RB5;
void main(void)
{
ANSEL = 0x00; //select POTA & PORTB as digital i/o
TRISA = 0xFF; //select PORTA as input
TRISB = 0x00; //select PORTB as output

while(1)

{
if(RA0==1){ //switch on S1

RB0=1; //set RB0 as high
RB5=0; //enable TE
}
else{ //switch off S1
RB0=0; //set RB0 as low
RB5=0; //enable TE
}

if(RA1==1){

RB1=1; //set RB1 as high
RB5=0; //enable TE
}
else{
RB1=0; //set RB1 as low
RB5=0; //enable TE
}

if(RA2==1){

RB2=1; //set RB2 as high
RB5=0; //enable TE
}
else{
RB2=0; //set RB2 as low
RB5=0; //enable TE
}

if(RA3==1){

RB3=1; //set RB3 as high
RB5=0; //enable TE
}
else{
RB3=1; //set RB3 as low
RB5=0; //enable TE
}
}
return 0;
}

i've wrote a program here. Can any1 tell me what's wrong with it because error message keep poops up everytime i try to build it.

What kind of errors?????
Also specify the ucontroller you are using.


return 0;????
Also check this again.
Does not necessary here.