#include <string.h>
#include <stdio.h>


void xisa() {
	// doesn't work
	char aux[10] = {'A', 'A', 'A', 'A', 'A'} ;
	if ('A' == aux[2]) printf("\n1st led"); 
}


void xisb() {
	// doesn't work
	char aux[] = "BBBBBBB";	
	if ('B' == aux[2]) printf("\n2ndt led"); // 2nd led
}

void xisc() {
	// WORKS !!!!
	char aux[10];
	
	aux[0] = 'C';
	aux[1] = 'C';
	aux[2] = 'C';
	aux[3] = 'C';
	aux[4] = 'C';	
	aux[0] = '\0';
	
	if ('C' == aux[2]) printf("\n3rd led"); // 3rd led
}


void xisd() {
	// doesn't work
	char aux[10];
	aux[0] = '\0';
	strcat(aux, "DDDDDDDD");
	if ('D' == aux[2]) printf("\n4th led");  //4th led
}



void main(){
	/***************************************************
	*  I/O
	***************************************************/
	//outp(0xff,DDRB);   // PORT B = OUTPUT	
	//outp(0xff,PORTB);  // WRITE PORT	
	//PORTB = 0x00;      // BLANKS PORT
		
	
	xisa();  
	xisb();
	xisc();
	xisd();
	
	
	
}