Question

How to transfer the below two global varibale into local variable where this two variable are used. PLEASE HELP

// Read in the user's height

int customerAge = 0;
double customerHeight = 0;

// *******************************************
// Functions
// *******************************************
void readHeight();
void printCustomerInfo();
bool askToDoAnother();


int main() {

    bool keepReading = 1;
    
    while (keepReading) {
        // Read in the customer info:
        // ... Read the height
        readHeight();

        // ... Read Age
        cout << "Enter their age: ";
        cin >> customerAge;

        // Display a summary:
        printCustomerInfo();

        // Do another?
        keepReading = askToDoAnother();
    }

    return 0;
}

// Read in the user's height
void readHeight() {
    cout << "Enter customer height (feet): ";
    cin >> customerHeight;

    while (customerHeight > MAX_HEIGHT || customerHeight < MIN_HEIGHT) {
        cout << fixed << setprecision(1);
        cout << "ERROR: Height must be between " << MIN_HEIGHT
             << " and " << MAX_HEIGHT << " feet.\n";
        cout << "Enter customer height (feet): ";
        cin >> customerHeight;
    }
}

// Print the customer's info to the screen.
void printCustomerInfo() {
    cout << fixed << setprecision(1);
    cout << "\n";
    cout << "Customer summary: \n";
    cout << "\tHeight: " << customerHeight << " feet\n";
    cout << "\tAge:    " << customerAge << endl;
    cout << "\n";
}

// Ask the user if they want to enter more data.
bool askToDoAnother() {
    char choice = ' ';
    // Read in the user's selection
    cout << "Enter another customer? (Y/N) ";
    cin >> choice;
    return (choice == 'Y' || choice == 'y');
}

// Ask for a customer's info, and display it to the screen.

Answer 1

Solution:

Look at the below code for better understanding..........

You just need to modify the functions as

void readHeight(double &);
void printCustomerInfo(double,int);

Full Code:

void readHeight(double &);
void printCustomerInfo(double,int);
bool askToDoAnother();
int main() {
    int customerAge;
    double customerHeight;
    bool keepReading = 1;
    while (keepReading) {
        // Read in the customer info:
        // ... Read the height
        readHeight(customerHeight);
        // ... Read Age
        cout << "Enter their age: ";
        cin >> customerAge;
        // Display a summary:
        printCustomerInfo(customerHeight,customerAge);
        // Do another?
        keepReading = askToDoAnother();
    }
    return 0;
}

// Read in the user's height
void readHeight(double &customerHeight) {
    cout << "Enter customer height (feet): ";
    cin >> customerHeight;
    while (customerHeight > MAX_HEIGHT || customerHeight < MIN_HEIGHT) {
        cout << fixed << setprecision(1);
        cout << "ERROR: Height must be between " << MIN_HEIGHT
             << " and " << MAX_HEIGHT << " feet.\n";
        cout << "Enter customer height (feet): ";
        cin >> customerHeight;
    }
}

// Print the customer's info to the screen.
void printCustomerInfo(double customerHeight,int customerAge) {
    cout << fixed << setprecision(1);
    cout << "\n";
    cout << "Customer summary: \n";
    cout << "\tHeight: " << customerHeight << " feet\n";
    cout << "\tAge:    " << customerAge << endl;
    cout << "\n";
}

// Ask the user if they want to enter more data.
bool askToDoAnother() {
    char choice = ' ';
    // Read in the user's selection
    cout << "Enter another customer? (Y/N) ";
    cin >> choice;
    return (choice == 'Y' || choice == 'y');
}

I hope this would help......................:-))