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I need help with writing comparator program

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wakaka

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877A comparator

Im a noob in programming, this is my program:

#include <16F877a.h>
#fuses HS,NOWDT,NOPROTECT,NOLVP
#use delay (clock=20000000)

void main()

{
byte value;

setup_port_a(ALL_ANALOG);
setup_adc(adc_clock_internal);
set_adc_channel( 5 );
setup_vref(VREF_HIGH|15);


setup_comparator(A0_A3_A1_A2);

// here i dunno how to proceed. If A3's voltage is greater than A2's, output_high(Pin_B7). or is there any other ways to do it??? need help, thanks......
 

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