RA$1$ button, what will happen?

void main$()\{$

unsigned short current$\_$duty, old$\_$duty, current$\_$duty$1,$ old$\_$duty$1$;

PORTA $=255$;

TRISA $=255$; $,//$ configure PORTA pins as input

PORTB $=0$;$\frac{,}{\frac{?}{?}}$ set PORTB to $0$

TRISB $=0$;$,//$ designate PORTB pins as output

PORTC $=0$;$\frac{,}{\frac{?}{?}}$ set PORTC to $0$

TRISC $=0$;$\frac{,}{\frac{?}{?}}$ designate PORTC pins as output

PWM$1\_$Init$(5000)$; $//$ Initialize PWM$1$ module at $5$KHz

PWM$2\_$Init$(5000)$; $\frac{,}{\frac{?}{?}}$ Initialize PWM$2$ module at $5$KHz

current$\_$duty $=16$;$,//$ initial value for current$\_$duty

current$\_$duty$1=16$; $\frac{,}{\frac{?}{?}}$ initial value for current$\_$duty$1$

PWM$1\_$Start$()$; $\frac{,}{\frac{?}{?}}$ start PWM$1$

PWM$2\_$Start$()$; $//$ start PWM$2$

PWM$1\_$Set$\_$Duty$($current$\_$duty$)$; $//$ Set current duty for PWM$1$

PWM$2\_$Set$\_$Duty$($current$\_$duty$1)$; $//$ Set current duty for PWM$2$

while $(1)\}//$ endless loop

if $($RAO$\_$bit$)\{//$ button on RAO pressed

Delay$\_$ms$(40)$;

current$\_$duty$++$; $//$ increment current$\_$duty

PWM$1\_$Set$\_$Duty$($current$\_$duty$)$;

$\}$

if $($RA$1\_$bit$)\{//$ button on RA$1$ pressed

Delay$\_$ms$(40)$;

current$\_$duty$--$; $//$ decrement current$\_$duty

PWM$1\_$Set$\_$Duty$($current$\_$duty$)$;

$\}$

if $($RA$2\_$bit$)\{//$ button on RA$2$ pressed

Delay$\_$ms$(40)$;

current$\_$duty$1++$; $//$ increment current$\_$duty$1$

PWM$2\_$Set$\_$Duty$($current$\_$duty$1)$;

$\}$

if $($RA$3\_$bit$)\{//$ button on RA$3$ pressed

Delay$\_$ms$(40)$;

current$\_$duty$1--$; $//$ decrement current$\_$duty$1$

PWM$2\_$Set$\_$Duty$($current$\_$duty$1)$;

$\}$

Delay$\_$ms$(5)$; $//$ slow down change pace a little

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