Café Noir Flowchart Design – Dr. Trippers Stuff

@startuml
!define RECTANGLE class

RECTANGLE Café_Noir_Coffee_Shop {
:Main Program Loop
}

start

:Initialize Variables;
:Set Zip Code to “54984”; // Assuming the coffee shop’s zip code is 54984
:Set Age to 0;
:Set ItemsCount to 0;
:Set ValidZipCode to false;
:Set ValidAge to false;
:Set ValidItems to false;

while (true) {
:Prompt for Zip Code;
if (Zip Code > 5 digits) then (exit loop)
else if (Zip Code is valid) then
:ValidZipCode = true;
else
:Invalid zip code message;
end if;

while (!ValidZipCode) {
:Prompt for Zip Code again;
if (Zip Code > 5 digits) then (exit loop)
else if (Zip Code is valid) then
:ValidZipCode = true;
else
:Invalid zip code message;
end if;
}

:Prompt for Age;
if (Age 110) then
:Invalid age message;
else
:ValidAge = true;
end if;

while (!ValidAge) {
:Prompt for Age again;
if (Age 110) then
:Invalid age message;
else
:ValidAge = true;
end if;
}

:Prompt for Number of Items;
if (Items 10) then
:Reprompt for Items;
:Reprompt for Items again;
if (Items 10) then
:Error message;
break;
else
:ValidItems = true;
end if;
else
:ValidItems = true;
end if;

while (!ValidItems && attempt < 3) {
:Prompt for Number of Items again;
if (Items 10) then
:Reprompt for Items;
attempt++;
else
:ValidItems = true;
end if;
}

if (Zip Code == “54984”) {
:Count items from shop’s zip code;
} else {
:Count items from other zip codes;
}

if (Age < 45) {
:Count items for under 45 age group;
} else {
:Count items for 45 and older age group;
}

:Prompt for next order or 0 for Zip Code to end;
if (Zip Code == 0) then (exit loop)
}

:Display counts from same zip code vs others;
:Display average customer age;
:Display item counts by age group;

stop
@enduml

Your UML flowchart appears to be well-structured but there are a couple of minor improvements to consider for clarity and consistency:

1. **`attempt` Variable**: The variable `attempt` is referenced in the loop for retrying the item count input but isn't initialized anywhere. You'll want to initialize it before the loop starts.

2. **Zip Code Validation Loop**: The check for a 5-digit zip code is handled twice (once inside the first loop and once inside the second). You can simplify this to ensure only one validation check happens before prompting again.

3. **Flow Control**: The loop `while (true)` might cause an issue since it's tied to specific conditions (i.e., Zip Code, Age, and Items validation). Make sure that the flow inside each loop is clearly defined for clarity.

Other than that, the logic is sound for prompting inputs and collecting data for the coffee shop’s statistics. Here's the updated version addressing these points:

“`plantuml
@startuml
!define RECTANGLE class

RECTANGLE Café_Noir_Coffee_Shop {
:Main Program Loop
}

start

:Initialize Variables;
:Set Zip Code to "54984"; // Assuming the coffee shop's zip code is 54984
:Set Age to 0;
:Set ItemsCount to 0;
:Set ValidZipCode to false;
:Set ValidAge to false;
:Set ValidItems to false;
:Set attempt to 0;

while (true) {
:Prompt for Zip Code;
if (Zip Code == 0) then (exit loop)
else if (Zip Code has 5 digits) then
:ValidZipCode = true;
else
:Invalid zip code message;
end if;

while (!ValidZipCode) {
:Prompt for Zip Code again;
if (Zip Code == 0) then (exit loop)
else if (Zip Code has 5 digits) then
:ValidZipCode = true;
else
:Invalid zip code message;
end if;
}