///////////////////////////////////////////////////////////////////////
//  Template .C File for reading doubles, ints and chars             //
///////////////////////////////////////////////////////////////////////

#include <iostream.h>

double readDouble()             // Safer way to read a double
{
    double num;
    cin >> num;
    while(cin.fail())           // check for format errors
    {                           // in executing previous statement
        cin.clear();            // clear up the input stream
        cin.ignore(80, '\n');   // ignore remaining characters on the line
        cout << "Please enter the number correctly: ";
        cin >> num;
    }
    cin.ignore(80, '\n');       // ignore remaining characters on the line
    return num;
}

int readInt()                   // Safer way to read an int
{
    int n;
    cin >> n;
    while(cin.fail())           // check for format errors
    {                           // in executing previous statement
        cin.clear();            // clear up the input stream
        cin.ignore(80, '\n');   // ignore remaining characters on the line
        cout << "Please enter the integer correctly: ";
        cin >> n;
    }
    cin.ignore(80, '\n');       // ignore remaining characters on the line
    return n;
}

void readIntViaRef(int& n)
{
    cin >> n;
    while(cin.fail())           // check for format errors
    {                           // in executing previous statement
        cin.clear();            // clear up the input stream
        cin.ignore(80, '\n');   // ignore remaining characters on the line
        cout << "Please enter the integer correctly: ";
        cin >> n;
    }
    cin.ignore(80, '\n');       // ignore remaining characters on the line
    return;
}


char readChar()                 // safer way to read a single character
{
    char c;
    cin >> c;
    cin.ignore(80, '\n');       // ignore remaining characters on the line
    return c;
}


int main()
{
    char c;
    double diameter;
    int n;
    int nRef;  // for entering via reference parameter

    cout << "Enter one character: " << endl;
    c = readChar();
        
    cout << "Enter diameter: ";
    diameter = readDouble();

    cout << "Enter an integer: ";
    n = readInt();

    cout  << "Enter another integer: ";
    readIntViaRef(nRef);

    cout << "Integers entered: " << n << " and " << nRef << endl;

    return 0;
}