Interrupt Problem 16f877a

#include <stdio.h>
#include <htc.h>
#include <pic.h>
#include "lcd.h"
#include "usart.h"
#ifndef _XTAL_FREQ
 #define _XTAL_FREQ 4000000
#endif


#define SPI_CLOCK RC3			//  Define the Max6675 pins
#define SPI_CS RC5				
#define SPI_DATA RC4
#define SPI_SS RA5



void display_value1(short long value);




/**************************
MAX6675
***************************/


short long GetTemp(void){
unsigned char address;
int highbyte=0;
int lowbyte=0;
int lowbyte1=0;
int value=0;
int dummy=0;


RC5=0;

__delay_ms(220);

SSPBUF=0X03;
while(!BF){};
dummy=SSPBUF;
SSPBUF=address<<8;
while(!BF){};
lowbyte=SSPBUF;
SSPBUF=address;
while(!BF){};
highbyte=SSPBUF;

dummy=(lowbyte<<5|highbyte>>3);
RC5=1;

return dummy;
}

void init_spi(void){

	TRISC5=0;	// SDO
	TRISC4=1;	// SDI
	TRISC3=0;	// SCK


	SSPSTAT=0b00000000;
    SSPCON= 0b00000000;
                  
	CKE=0;
	CKP=0;
	SMP=0;
	SSPEN=1;
             
	SPI_CS=0;
	SPI_CS=1;

SSPIF=0;

}
void System_init(void){
TRISB = 0b00000000;	//set B1-B7 as output, B0 as input
PORTB=0;
}

void main(void)
{

int CurrentTemp = 0.0;
int CurrentTemp1=0.0;

System_init();
init_spi();

SSPIF	= 0;	// Synchronous Serial Port Interrupt Flag bit

	init_comms();
	INTCON=0;					// purpose of disabling the interrupts.
	lcd_init();					// Calling lcd_init defined in lcd.h
	lcd_goto(0);				// select first line in LCD
	lcd_puts("Encoder:");		// display text in first line
	lcd_goto(0x40);				// Select second line
	lcd_puts("Tempera: ");		// display text in second line

	
	while(1)
{

CurrentTemp = GetTemp();
CurrentTemp2=CurrentTemp *0.25;

		lcd_goto(0x48);	// Select second line
		display_value1(CurrentTemp);
		lcd_putch('C');
		lcd_goto(0x08);	
		display_value1(CurrentTemp1);
		lcd_putch('m');
__delay_ms(5);

RB0=0;
__delay_ms(10);
RB0=1;
printf("U\n%04d%%%04d\nQ", CurrentTemp2,CurrentTemp);
__delay_ms(400);


}					//end of while(1)
}				//end of void(main)

while(!bf){}