Need a little help with printf

#include <stdio.h>
#include <htc.h>
__CONFIG(FOSC_INTRCIO & WDTE_OFF & PWRTE_OFF & MCLRE_OFF & 
			CP_OFF & BOREN_OFF & CPD_OFF & IESO_OFF & FCMEN_OFF);
#ifndef _XTAL_FREQ
 // Unless already defined assume 4MHz system frequency
 // This definition is required to calibrate __delay_us() and __delay_ms()
 #define _XTAL_FREQ 8000000
#endif


void init_a2d(void){
        OSCCON = 0B01111111;
	TRISA =  0B00000001;
	ADCON0 = 0B10000001;
	ADCON1 = 0B01110000;
	ANSEL =  0B00000000;
	ANSELH = 0B00000000;
}

unsigned char read_a2d(unsigned char channel){
	channel=0x01;	
	ANSEL=(channel);	
        GO_DONE	=1;	// initiate conversion on the selected channel
	while(GO_DONE)continue;
	return((ADRESH<<8)+(ADRESL));	// return 10bits of the result
}
void SetupUART(void){
     SPBRGH = 0;
     SPBRG = 51; //9600 bps
     TXSTA = 0x24; //8-bit, Transmission enabled, High Speed
     RCSTA = 0x80; //Disable Reception, Enable UART module
     BAUDCTL = 0; //8-bit, Auto Baud disabled
}

void putch(unsigned char byte) {
		// output one byte //
	 while(!TXIF)	// set when register is empty 
		continue;
             TXREG = byte; //Start transmission
}
unsigned char getch() {
	return	read_a2d(1);
}

unsigned char getche(void)
{
	unsigned char c;
	putch(c = getch());
	return c;
}

void main(void){
	unsigned char x; 
	init_a2d();	// initialise the A2D module
	GIE=0;		// we don't want interrupts
        SetupUART();
	
	while(1){
		x = getch();	// returns adc reading
		printf("\rI detected [%c]",x);	// sends out x 
    	        __delay_ms(1000);  // delay
 	         printf("Unsigned value: %u\n", 150);	// this is just for seeing how printf works 
	}
}

	while(1){
		x = getch();	// read a response ADC
    	printf("I detected : %d\n", x);	// sends it out
    	__delay_ms(1000);  // delay	
	}
}