Hi,
I'm trying to write a switch case statement that keeps track of the previous case, and depending on the the previous case it does something:
my code so far is
void setup() {
// initialize serial communication:
Serial.begin(9600);
}
void loop() {
if (Serial.available() > 0) {
int inByte = Serial.read();
int prev=1;
switch (inByte){
case 'a':
if(prev==1){
prev++;
Serial.println(prev, DEC);
}
break;
case 'b':
if (prev==2){
prev--;// sets prev back to 1
Serial.println(prev, DEC);
}
break;
}
}
}
What i tried to do was initialize prev to 1, so in case 'a' prev=1 and then i want to update prev to equal 2, so that after the user types 'a' 2 is stored in prev, which then allows the if statement incase b to be true.
However what happens with this code is that prev always goes back to 1 and never equals 2 so the if statement in case b is never true.
can someone please suggest a good way to make this work?
Thank you, 
