Matrix scankey 3×4 for Lcd 2 line For CSS Compiler

 
#include <16F877.h>
#device adc=8
#FUSES NOWDT ,XT                                        
#use delay(clock=4000000)
char const s[10]={'0','1','2','3','4','5','6','7','8','9'}; 
void init_mcu  (void); 
void display (void);
void display1 (void);
void calculate (void);
void hex_bcd2(int8 k);

/*-------define keypad------------*/
#define row0  pin_b0 // input
#define row1  pin_b1 // input
#define row2  pin_b2 // input
#define row3  pin_b3 // input

#define col0  pin_b4 // output
#define col1  pin_b5 // output
#define col2  pin_b6 // output
/*------set variable -----------*/
int8 digit=0;
int16 value1,value2;
int8 set[34];
int8 i=0,k=0;
#include "lcd_4bit.c"
#include "get_key3x4.c"

void main(void){
   setup_adc_ports(NO_ANALOGS);
   setup_adc(ADC_OFF);
   setup_spi(SPI_SS_DISABLED);
   setup_timer_0(RTCC_INTERNAL|RTCC_DIV_1);
   setup_timer_1(T1_DISABLED);
   setup_timer_2(T2_DISABLED,0,1);
   set_tris_B(0x0f);
   set_tris_D(0x00);
   output_high(col0);
   output_high(col1);
   output_high(col2);
   output_high(row0);
   output_high(row1);
   output_high(row2); 
   output_high(row3); 
   value1 = 0;
   value2 = 0;
   i = 0;
   set[0]=0;
   lcd_init();
   init_mcu();
   delay_ms(2000); 
   lcd_clear();

while(true){    
    scan_key();
    display();  
   }
}

void init_mcu (void){

   lcd_row_col(1,0);
   lcd_putc("Electric Power   ");
   lcd_row_col(2,0);
   lcd_putc("Kchimicro.PIC    ");  

 }

void hex_bcd2(int8 k){
 k%=10;
 a=0;b=0; 
 b=k%10;
 b=k;
}

void hex_bcd1(int16 k){
 a=0; b=0;c=0;d=0;e=0;
 while(k>=10000){
    a++;
    k -= 10000;} 
 while(k>=1000){
    b++;
    k -= 1000;}    
 while(k>=100){
    c++;
    k -= 100;}
 while(k>=10){
    d++;
    k-=10;}
 e=k;
}

void display (void){
   lcd_row_col(1,0);
   hex_bcd2(set[i]);
   lcd_row_col(1,i-1);
   lcd_putc(s[b]); 
   delay_ms(10);
/*--------------------------------*/   
 if (i > 16){  
    hex_bcd2(set[i]);
    lcd_row_col(2,i-17);
    lcd_putc(s[b]);} 
    delay_ms(10);
}

void calculate (void){
 if (k<10){ 
    if (digit++>31){digit=0;i = 0;}
    else {i++;set[i] = k;}}               
 if(k== 11){
      do{
      value1--;
      display();
      delay_ms(500);
      }while(value1>0);
      digit=0;value1 = 0; i=0;
   }     
}