ADC programming of PIC16F877A

Convert the analog value(pot) to digital and display it on lcd

#include<pic.h>
void delay();
void cmd(int);
void data(char);
void main()
{
int a,e,i;
char b[]="00000";
TRISB=0X00;
TRISC=0X00;
cmd(0X38);
cmd(0X01);

cmd(0X0E);
cmd(0X80);

ADCON0=0X01;
ADCON1=0X00;
ADGO=1;
while(ADGO==0);
e=ADRESH;
for(i=0;e>0;i++)
{
a=e%10;
e=e/10;
a=a+48;
b[i]=a;
}
data('a');
for(i=2;i>=0;i--)
data(b[i]);

ADCON0=0X09;
ADCON1=0X00;
ADGO=1;
while(ADGO==0);
e=ADRESH;
for(i=0;e>0;i++)
{
a=e%10;
e=e/10;
a=a+48;
b[i]=a;
}
cmd(0XC0);
data('b');
for(i=2;i>=0;i--)
data(b[i]);
delay();
delay();
}
void cmd(int s)
{
PORTB=s;
RC0=0;
RC1=1;
delay();
RC1=0;
}

void data(char a)
{
PORTB=a;
RC0=1;
RC1=1;
delay();
RC1=0;
}
void delay()
{
int k,j;
for(k=0;k<100;k++)
for(j=0;j<100;j++);
}