#include <iostream>
#include <iomanip>
#include <limits>
#include <string>

using namespace std;

// just a random floating point constant.
const double MY_NUMBER{23.3124};

void PrintNums();

int main() {
    float aNumber{1.0f};
    string restOfLine;

    cout << "Default " << endl;
    PrintNums();

    cout << "With Showpoint " << endl;
    cout << showpoint;
    PrintNums();

    cout << "With setprecision(15) " << endl;
    cout << noshowpoint;
    cout << setprecision(15);
    PrintNums();

   
    cout << "with fixed " << endl;
    cout << fixed; 
    PrintNums();

    cout << "with scientific " << endl;
    cout << scientific; 
    PrintNums();

    cout << defaultfloat;
    cout << "With defaultfloat" << endl;
    PrintNums();

    cout << endl << endl;
    while (aNumber != 0) {
       cout << "Enter a number =>";
       cin >> aNumber;
       getline(cin, restOfLine);
       cout << "The number was " << aNumber << endl;
       cout << "The rest of the line was \"" << restOfLine << '"' << endl;
       cout << endl;
    }

    cout << endl << endl;
    cout << setprecision(40);
    cout << "The Limits" << endl;
    cout << "\tfloat min: " << numeric_limits<float>::min() << endl;
    cout << "\tfloat max: " << numeric_limits<float>::max() << endl;
    cout << "\tdouble min: " << numeric_limits<double>::min() << endl;
    cout << "\tdouble max: " << numeric_limits<double>::max() << endl;
    cout << "\tlong double min: " << numeric_limits<long double>::min() << endl;
    cout << "\tlong double max: " << numeric_limits<long double>::max() << endl;


    cout << endl << endl;
    cout << "The Gap " << endl;
    aNumber = 7;
    cout << aNumber << " + " << numeric_limits<float>::max() << endl;
    aNumber += numeric_limits<float>::max();
    cout << "  = " << aNumber << endl;

    cout << endl << endl;
    cout << "Overflow " << endl;
    cout  << "   " << aNumber << endl <<  " + " << aNumber  << endl;
    aNumber += aNumber;
    cout << " = " << aNumber << endl;
    
    cout << endl << endl;
    cout << "Roundoff " << endl;
    cout << fixed;
    aNumber = 1.0e-15f;
    cout << "1.0e-15f = " << aNumber << endl;

    cout << endl << endl;
    cout << "NAN" << endl;
    cout << " 4/0 = " <<  4/0 << endl;

    return 0;
}

void PrintNums() {
    float aNumber{1.0f};
    float bNumber{1.0f};
    int i{0};
    string junk;

    while(i < 10) {
       cout  << setw(30) << aNumber  << setw(40) << bNumber << endl;
       aNumber /= 11;
       bNumber *= 11;
       ++i;
    }
    cout << endl; 
    cout << "Press enter to continue";
    getline(cin,junk);
    cout << endl << endl;
    return;
}