Why won't my "main()" function call a void function?

Question

I'm working on a program to aid me in world-building that randomly generates a settlement (hamlet, village, town, city) based on a nation (German, Latin, Eastern) that the user chooses. Unfortunately, my code halts right at the "main()" function as it won't call the "settlementCreation()" void function I created.

I've tried moving the function I want to call above the "main()" function, or my usual method of creating the function above, defining it's contents below, but neither of these are working. I can't figure out any other solutions with my limited experience coding C++.

Main() Function:

int main() {
    char tempChoice{};
    bool isMakingSettlement = true;
    while (isMakingSettlement = true) {
        cout << "Create a settlement? (y/n): ";
        cin >> tempChoice;
        cout << "\n\n";
        if (tempChoice == 'y') {
            settlementCreation();
        } else {
            isMakingSettlement = false;
        }
    }
    return 0;
}

settlementCreation() Function:

void settlementCreation() {
    int tempType{};
    int tempNation{};
    bool isTypeValid = false;
    bool isNationValid = false;
    while (isTypeValid = false) {
        cout << "What type of settlement would you like to create?:";
        cout << "\n     1. Hamlet";
        cout << "\n     2. Village";
        cout << "\n     3. Town";
        cout << "\n     4. City\n";
        cin >> tempType;
        if (tempType >= 1 && tempType <= 4) {
            isTypeValid = true;
        } else {
            cout << " is an invalid choice, please select a valid choice.";
        }
        cout << "\n\n";
    }
    while (isNationValid = false) {
        cout << "What nation would you like your settlement to be in?: ";
        cout << "\n     1. Latin";
        cout << "\n     2. German";
        cout << "\n     3. Eastern\n";
        cin >> tempNation;
        if (tempNation >= 1 && tempNation <= 3) {
            isNationValid = true;
        } else {
            cout << " is an invalid choice, please select a valid choice.";
        }
        cout << "\n\n";
    }
    Settlement objSettlement(tempType,tempNation);
}

So the program is supposed to allow the user to choose a nation and a settlement type before redirecting to the Settlement object constructor to create the objSettlement instance of the object. The usual outcome however, is just an infinite loop of: "Create a settlement? (y/n): " With no responses I've tried closing the program or going to the "settlementCreation()" function.

Answer 1

while (isMakingSettlement = true) {

This does not check if isMakingSettlement is true. It sets isMakingSettlement to true! This means the check in the while loop always sees true, so never stops going round.

Use while (isMakingSettlement == true).

(Or while (isMakingSettlement), or while (true == isMakingSettlement); all are fine, it's a stylistic choice, though the last would have helped you catch this bug!).

Similarly for all your other while loops.

---

Assuming you fix the above, your next problem will be here:

bool isTypeValid = false;
bool isNationValid = false;
while (isTypeValid == false) { // once corrected
    // ... never get here!
while (isNationValid == false) { // once corrected
    // ... never get here!

You always set those bools to false, so these loops are never executed.