Question

Write a program using a counter that performs the following operation: 1. Turn on PL1 when the count is 6. 2. Turn ON PL2 when the count is 12- at which time PL1 should turn off. 3. Turn ON PL3 when the count is between 16 to 20- at which time PL2 should 4. 5. turn off. Turn off all the lights for count values greater than 20 and less than 25. Reset the counter to O when count is 25.

Answer 1

As per above image, You have not specified any language to code it.

I am writing this code in java language.

//java program

public class Lights{

public static int PL1=0,PL2=0,PL3=0;

static void PL1(){

PL1=1;

}

static void PL2(){

PL1=0;

PL2=1;

}

static void PL3(){

PL1=0;

PL2=0;

PL3=1;

}

static void PL4(){

PL1=0;

PL2=0;

PL3=0;

}

public static void main(String args[]){

for(int i=0;i<=25;i++){

if(i==6) {

PL1();

System.out.println("Counter:"+i+" PL1:"+Lights.PL1+" PL2:"+PL2+" PL3:"+PL3);

}

else if(i==12) {

PL2();

System.out.println("Counter:"+i+" PL1:"+PL1+" PL2:"+PL2+" PL3:"+PL3);

}

else if(i>=16 && i<=20) {

PL3();

System.out.println("Counter:"+i+" PL1:"+PL1+" PL2:"+PL2+" PL3:"+PL3);

}

else if(i>20 && i<25){

PL4();

System.out.println("Counter:"+i+" PL1:"+PL1+" PL2:"+PL2+" PL3:"+PL3);

}

else if(i==25){

System.out.println("Counter:"+i);

i=0;

System.out.println("Resetting Counter to:"+i);

break;

}

else{

System.out.println("Counter:"+i+" PL1:"+PL1+" PL2:"+PL2+" PL3:"+PL3);  

}

}

}

}