WeixiangYan/CodeTransOcean huggingface dataset:
Task: Angle difference between two bearings


C++: #include <cmath>
#include <iostream>
using namespace std;

double getDifference(double b1, double b2) {
	double r = fmod(b2 - b1, 360.0);
	if (r < -180.0)
		r += 360.0;
	if (r >= 180.0)
		r -= 360.0;
	return r;
}

int main()
{
	cout << "Input in -180 to +180 range" << endl;
	cout << getDifference(20.0, 45.0) << endl;
	cout << getDifference(-45.0, 45.0) << endl;
	cout << getDifference(-85.0, 90.0) << endl;
	cout << getDifference(-95.0, 90.0) << endl;
	cout << getDifference(-45.0, 125.0) << endl;
	cout << getDifference(-45.0, 145.0) << endl;
	cout << getDifference(-45.0, 125.0) << endl;
	cout << getDifference(-45.0, 145.0) << endl;
	cout << getDifference(29.4803, -88.6381) << endl;
	cout << getDifference(-78.3251, -159.036) << endl;
	
	cout << "Input in wider range" << endl;
	cout << getDifference(-70099.74233810938, 29840.67437876723) << endl;
	cout << getDifference(-165313.6666297357, 33693.9894517456) << endl;
	cout << getDifference(1174.8380510598456, -154146.66490124757) << endl;
	cout << getDifference(60175.77306795546, 42213.07192354373) << endl;

	return 0;
}






Python: from __future__ import print_function
 
def getDifference(b1, b2):
	r = (b2 - b1) % 360.0
	
	
	if r >= 180.0:
		r -= 360.0
	return r
 
if __name__ == "__main__":
	print ("Input in -180 to +180 range")
	print (getDifference(20.0, 45.0))
	print (getDifference(-45.0, 45.0))
	print (getDifference(-85.0, 90.0))
	print (getDifference(-95.0, 90.0))
	print (getDifference(-45.0, 125.0))
	print (getDifference(-45.0, 145.0))
	print (getDifference(-45.0, 125.0))
	print (getDifference(-45.0, 145.0))
	print (getDifference(29.4803, -88.6381))
	print (getDifference(-78.3251, -159.036))
 
	print ("Input in wider range")
	print (getDifference(-70099.74233810938, 29840.67437876723))
	print (getDifference(-165313.6666297357, 33693.9894517456))
	print (getDifference(1174.8380510598456, -154146.66490124757))
	print (getDifference(60175.77306795546, 42213.07192354373))
Task: Angle difference between two bearings


C++: #include <cmath>
#include <iostream>
using namespace std;

double getDifference(double b1, double b2) {
	double r = fmod(b2 - b1, 360.0);
	if (r < -180.0)
		r += 360.0;
	if (r >= 180.0)
		r -= 360.0;
	return r;
}

int main()
{
	cout << "Input in -180 to +180 range" << endl;
	cout << getDifference(20.0, 45.0) << endl;
	cout << getDifference(-45.0, 45.0) << endl;
	cout << getDifference(-85.0, 90.0) << endl;
	cout << getDifference(-95.0, 90.0) << endl;
	cout << getDifference(-45.0, 125.0) << endl;
	cout << getDifference(-45.0, 145.0) << endl;
	cout << getDifference(-45.0, 125.0) << endl;
	cout << getDifference(-45.0, 145.0) << endl;
	cout << getDifference(29.4803, -88.6381) << endl;
	cout << getDifference(-78.3251, -159.036) << endl;
	
	cout << "Input in wider range" << endl;
	cout << getDifference(-70099.74233810938, 29840.67437876723) << endl;
	cout << getDifference(-165313.6666297357, 33693.9894517456) << endl;
	cout << getDifference(1174.8380510598456, -154146.66490124757) << endl;
	cout << getDifference(60175.77306795546, 42213.07192354373) << endl;

	return 0;
}







VB: Private Function tx(a As Variant) As String
    Dim s As String
    s = CStr(Format(a, "0.######"))
    If Right(s, 1) = "," Then
        s = Mid(s, 1, Len(s) - 1) & "       "
    Else
        i = InStr(1, s, ",")
        s = s & String$(6 - Len(s) + i, " ")
    End If
    tx = s
End Function
Private Sub test(b1 As Variant, b2 As Variant)
    Dim diff As Variant
    diff = (b2 - b1) - ((b2 - b1) \ 360) * 360
    diff = diff - IIf(diff > 180, 360, 0)
    diff = diff + IIf(diff < -180, 360, 0)
    Debug.Print Format(tx(b1), "@@@@@@@@@@@@@@@@"); Format(tx(b2), "@@@@@@@@@@@@@@@@@"); Format(tx(diff), "@@@@@@@@@@@@@@@@@")
End Sub
Public Sub angle_difference()
    Debug.Print "       b1               b2             diff"
    Debug.Print "---------------- ---------------- ----------------"
    test 20, 45
    test -45, 45
    test -85, 90
    test -95, 90
    test -45, 125
    test -45, 145
    test 29.4803, -88.6381
    test -78.3251, -159.036
    test -70099.7423381094, 29840.6743787672
    test -165313.666629736, 33693.9894517456
    test 1174.83805105985, -154146.664901248
    test 60175.7730679555, 42213.0719235437
End Sub
Task: Angle difference between two bearings




Go: package main

import "fmt"

type bearing float64

var testCases = []struct{ b1, b2 bearing }{
    {20, 45},
    {-45, 45},
    {-85, 90},
    {-95, 90},
    {-45, 125},
    {-45, 145},
    {29.4803, -88.6381},
    {-78.3251, -159.036},
}

func main() {
    for _, tc := range testCases {
        fmt.Println(tc.b2.Sub(tc.b1))
    }
}

func (b2 bearing) Sub(b1 bearing) bearing {
    switch d := b2 - b1; {
    case d < -180:
        return d + 360
    case d > 180:
        return d - 360
    default:
        return d
    }
}


Java: public class AngleDifference {

    public static double getDifference(double b1, double b2) {
        double r = (b2 - b1) % 360.0;
        if (r < -180.0)
            r += 360.0;
        if (r >= 180.0)
            r -= 360.0;
        return r;
    }

    public static void main(String[] args) {
        System.out.println("Input in -180 to +180 range");
        System.out.println(getDifference(20.0, 45.0));
        System.out.println(getDifference(-45.0, 45.0));
        System.out.println(getDifference(-85.0, 90.0));
        System.out.println(getDifference(-95.0, 90.0));
        System.out.println(getDifference(-45.0, 125.0));
        System.out.println(getDifference(-45.0, 145.0));
        System.out.println(getDifference(-45.0, 125.0));
        System.out.println(getDifference(-45.0, 145.0));
        System.out.println(getDifference(29.4803, -88.6381));
        System.out.println(getDifference(-78.3251, -159.036));

        System.out.println("Input in wider range");
        System.out.println(getDifference(-70099.74233810938, 29840.67437876723));
        System.out.println(getDifference(-165313.6666297357, 33693.9894517456));
        System.out.println(getDifference(1174.8380510598456, -154146.66490124757));
        System.out.println(getDifference(60175.77306795546, 42213.07192354373));
    }
}
Task: Angle difference between two bearings





Java: public class AngleDifference {

    public static double getDifference(double b1, double b2) {
        double r = (b2 - b1) % 360.0;
        if (r < -180.0)
            r += 360.0;
        if (r >= 180.0)
            r -= 360.0;
        return r;
    }

    public static void main(String[] args) {
        System.out.println("Input in -180 to +180 range");
        System.out.println(getDifference(20.0, 45.0));
        System.out.println(getDifference(-45.0, 45.0));
        System.out.println(getDifference(-85.0, 90.0));
        System.out.println(getDifference(-95.0, 90.0));
        System.out.println(getDifference(-45.0, 125.0));
        System.out.println(getDifference(-45.0, 145.0));
        System.out.println(getDifference(-45.0, 125.0));
        System.out.println(getDifference(-45.0, 145.0));
        System.out.println(getDifference(29.4803, -88.6381));
        System.out.println(getDifference(-78.3251, -159.036));

        System.out.println("Input in wider range");
        System.out.println(getDifference(-70099.74233810938, 29840.67437876723));
        System.out.println(getDifference(-165313.6666297357, 33693.9894517456));
        System.out.println(getDifference(1174.8380510598456, -154146.66490124757));
        System.out.println(getDifference(60175.77306795546, 42213.07192354373));
    }
}



Python: from __future__ import print_function
 
def getDifference(b1, b2):
	r = (b2 - b1) % 360.0
	
	
	if r >= 180.0:
		r -= 360.0
	return r
 
if __name__ == "__main__":
	print ("Input in -180 to +180 range")
	print (getDifference(20.0, 45.0))
	print (getDifference(-45.0, 45.0))
	print (getDifference(-85.0, 90.0))
	print (getDifference(-95.0, 90.0))
	print (getDifference(-45.0, 125.0))
	print (getDifference(-45.0, 145.0))
	print (getDifference(-45.0, 125.0))
	print (getDifference(-45.0, 145.0))
	print (getDifference(29.4803, -88.6381))
	print (getDifference(-78.3251, -159.036))
 
	print ("Input in wider range")
	print (getDifference(-70099.74233810938, 29840.67437876723))
	print (getDifference(-165313.6666297357, 33693.9894517456))
	print (getDifference(1174.8380510598456, -154146.66490124757))
	print (getDifference(60175.77306795546, 42213.07192354373))
Task: Angle difference between two bearings





Java: public class AngleDifference {

    public static double getDifference(double b1, double b2) {
        double r = (b2 - b1) % 360.0;
        if (r < -180.0)
            r += 360.0;
        if (r >= 180.0)
            r -= 360.0;
        return r;
    }

    public static void main(String[] args) {
        System.out.println("Input in -180 to +180 range");
        System.out.println(getDifference(20.0, 45.0));
        System.out.println(getDifference(-45.0, 45.0));
        System.out.println(getDifference(-85.0, 90.0));
        System.out.println(getDifference(-95.0, 90.0));
        System.out.println(getDifference(-45.0, 125.0));
        System.out.println(getDifference(-45.0, 145.0));
        System.out.println(getDifference(-45.0, 125.0));
        System.out.println(getDifference(-45.0, 145.0));
        System.out.println(getDifference(29.4803, -88.6381));
        System.out.println(getDifference(-78.3251, -159.036));

        System.out.println("Input in wider range");
        System.out.println(getDifference(-70099.74233810938, 29840.67437876723));
        System.out.println(getDifference(-165313.6666297357, 33693.9894517456));
        System.out.println(getDifference(1174.8380510598456, -154146.66490124757));
        System.out.println(getDifference(60175.77306795546, 42213.07192354373));
    }
}




VB: Private Function tx(a As Variant) As String
    Dim s As String
    s = CStr(Format(a, "0.######"))
    If Right(s, 1) = "," Then
        s = Mid(s, 1, Len(s) - 1) & "       "
    Else
        i = InStr(1, s, ",")
        s = s & String$(6 - Len(s) + i, " ")
    End If
    tx = s
End Function
Private Sub test(b1 As Variant, b2 As Variant)
    Dim diff As Variant
    diff = (b2 - b1) - ((b2 - b1) \ 360) * 360
    diff = diff - IIf(diff > 180, 360, 0)
    diff = diff + IIf(diff < -180, 360, 0)
    Debug.Print Format(tx(b1), "@@@@@@@@@@@@@@@@"); Format(tx(b2), "@@@@@@@@@@@@@@@@@"); Format(tx(diff), "@@@@@@@@@@@@@@@@@")
End Sub
Public Sub angle_difference()
    Debug.Print "       b1               b2             diff"
    Debug.Print "---------------- ---------------- ----------------"
    test 20, 45
    test -45, 45
    test -85, 90
    test -95, 90
    test -45, 125
    test -45, 145
    test 29.4803, -88.6381
    test -78.3251, -159.036
    test -70099.7423381094, 29840.6743787672
    test -165313.666629736, 33693.9894517456
    test 1174.83805105985, -154146.664901248
    test 60175.7730679555, 42213.0719235437
End Sub
Task: Angle difference between two bearings




Go: package main

import "fmt"

type bearing float64

var testCases = []struct{ b1, b2 bearing }{
    {20, 45},
    {-45, 45},
    {-85, 90},
    {-95, 90},
    {-45, 125},
    {-45, 145},
    {29.4803, -88.6381},
    {-78.3251, -159.036},
}

func main() {
    for _, tc := range testCases {
        fmt.Println(tc.b2.Sub(tc.b1))
    }
}

func (b2 bearing) Sub(b1 bearing) bearing {
    switch d := b2 - b1; {
    case d < -180:
        return d + 360
    case d > 180:
        return d - 360
    default:
        return d
    }
}




Python: from __future__ import print_function
 
def getDifference(b1, b2):
	r = (b2 - b1) % 360.0
	
	
	if r >= 180.0:
		r -= 360.0
	return r
 
if __name__ == "__main__":
	print ("Input in -180 to +180 range")
	print (getDifference(20.0, 45.0))
	print (getDifference(-45.0, 45.0))
	print (getDifference(-85.0, 90.0))
	print (getDifference(-95.0, 90.0))
	print (getDifference(-45.0, 125.0))
	print (getDifference(-45.0, 145.0))
	print (getDifference(-45.0, 125.0))
	print (getDifference(-45.0, 145.0))
	print (getDifference(29.4803, -88.6381))
	print (getDifference(-78.3251, -159.036))
 
	print ("Input in wider range")
	print (getDifference(-70099.74233810938, 29840.67437876723))
	print (getDifference(-165313.6666297357, 33693.9894517456))
	print (getDifference(1174.8380510598456, -154146.66490124757))
	print (getDifference(60175.77306795546, 42213.07192354373))
Task: Angle difference between two bearings




Go: package main

import "fmt"

type bearing float64

var testCases = []struct{ b1, b2 bearing }{
    {20, 45},
    {-45, 45},
    {-85, 90},
    {-95, 90},
    {-45, 125},
    {-45, 145},
    {29.4803, -88.6381},
    {-78.3251, -159.036},
}

func main() {
    for _, tc := range testCases {
        fmt.Println(tc.b2.Sub(tc.b1))
    }
}

func (b2 bearing) Sub(b1 bearing) bearing {
    switch d := b2 - b1; {
    case d < -180:
        return d + 360
    case d > 180:
        return d - 360
    default:
        return d
    }
}





VB: Private Function tx(a As Variant) As String
    Dim s As String
    s = CStr(Format(a, "0.######"))
    If Right(s, 1) = "," Then
        s = Mid(s, 1, Len(s) - 1) & "       "
    Else
        i = InStr(1, s, ",")
        s = s & String$(6 - Len(s) + i, " ")
    End If
    tx = s
End Function
Private Sub test(b1 As Variant, b2 As Variant)
    Dim diff As Variant
    diff = (b2 - b1) - ((b2 - b1) \ 360) * 360
    diff = diff - IIf(diff > 180, 360, 0)
    diff = diff + IIf(diff < -180, 360, 0)
    Debug.Print Format(tx(b1), "@@@@@@@@@@@@@@@@"); Format(tx(b2), "@@@@@@@@@@@@@@@@@"); Format(tx(diff), "@@@@@@@@@@@@@@@@@")
End Sub
Public Sub angle_difference()
    Debug.Print "       b1               b2             diff"
    Debug.Print "---------------- ---------------- ----------------"
    test 20, 45
    test -45, 45
    test -85, 90
    test -95, 90
    test -45, 125
    test -45, 145
    test 29.4803, -88.6381
    test -78.3251, -159.036
    test -70099.7423381094, 29840.6743787672
    test -165313.666629736, 33693.9894517456
    test 1174.83805105985, -154146.664901248
    test 60175.7730679555, 42213.0719235437
End Sub
Task: Angle difference between two bearings







Python: from __future__ import print_function
 
def getDifference(b1, b2):
	r = (b2 - b1) % 360.0
	
	
	if r >= 180.0:
		r -= 360.0
	return r
 
if __name__ == "__main__":
	print ("Input in -180 to +180 range")
	print (getDifference(20.0, 45.0))
	print (getDifference(-45.0, 45.0))
	print (getDifference(-85.0, 90.0))
	print (getDifference(-95.0, 90.0))
	print (getDifference(-45.0, 125.0))
	print (getDifference(-45.0, 145.0))
	print (getDifference(-45.0, 125.0))
	print (getDifference(-45.0, 145.0))
	print (getDifference(29.4803, -88.6381))
	print (getDifference(-78.3251, -159.036))
 
	print ("Input in wider range")
	print (getDifference(-70099.74233810938, 29840.67437876723))
	print (getDifference(-165313.6666297357, 33693.9894517456))
	print (getDifference(1174.8380510598456, -154146.66490124757))
	print (getDifference(60175.77306795546, 42213.07192354373))


VB: Private Function tx(a As Variant) As String
    Dim s As String
    s = CStr(Format(a, "0.######"))
    If Right(s, 1) = "," Then
        s = Mid(s, 1, Len(s) - 1) & "       "
    Else
        i = InStr(1, s, ",")
        s = s & String$(6 - Len(s) + i, " ")
    End If
    tx = s
End Function
Private Sub test(b1 As Variant, b2 As Variant)
    Dim diff As Variant
    diff = (b2 - b1) - ((b2 - b1) \ 360) * 360
    diff = diff - IIf(diff > 180, 360, 0)
    diff = diff + IIf(diff < -180, 360, 0)
    Debug.Print Format(tx(b1), "@@@@@@@@@@@@@@@@"); Format(tx(b2), "@@@@@@@@@@@@@@@@@"); Format(tx(diff), "@@@@@@@@@@@@@@@@@")
End Sub
Public Sub angle_difference()
    Debug.Print "       b1               b2             diff"
    Debug.Print "---------------- ---------------- ----------------"
    test 20, 45
    test -45, 45
    test -85, 90
    test -95, 90
    test -45, 125
    test -45, 145
    test 29.4803, -88.6381
    test -78.3251, -159.036
    test -70099.7423381094, 29840.6743787672
    test -165313.666629736, 33693.9894517456
    test 1174.83805105985, -154146.664901248
    test 60175.7730679555, 42213.0719235437
End Sub
Task: Angle difference between two bearings


C++: #include <cmath>
#include <iostream>
using namespace std;

double getDifference(double b1, double b2) {
	double r = fmod(b2 - b1, 360.0);
	if (r < -180.0)
		r += 360.0;
	if (r >= 180.0)
		r -= 360.0;
	return r;
}

int main()
{
	cout << "Input in -180 to +180 range" << endl;
	cout << getDifference(20.0, 45.0) << endl;
	cout << getDifference(-45.0, 45.0) << endl;
	cout << getDifference(-85.0, 90.0) << endl;
	cout << getDifference(-95.0, 90.0) << endl;
	cout << getDifference(-45.0, 125.0) << endl;
	cout << getDifference(-45.0, 145.0) << endl;
	cout << getDifference(-45.0, 125.0) << endl;
	cout << getDifference(-45.0, 145.0) << endl;
	cout << getDifference(29.4803, -88.6381) << endl;
	cout << getDifference(-78.3251, -159.036) << endl;
	
	cout << "Input in wider range" << endl;
	cout << getDifference(-70099.74233810938, 29840.67437876723) << endl;
	cout << getDifference(-165313.6666297357, 33693.9894517456) << endl;
	cout << getDifference(1174.8380510598456, -154146.66490124757) << endl;
	cout << getDifference(60175.77306795546, 42213.07192354373) << endl;

	return 0;
}



Go: package main

import "fmt"

type bearing float64

var testCases = []struct{ b1, b2 bearing }{
    {20, 45},
    {-45, 45},
    {-85, 90},
    {-95, 90},
    {-45, 125},
    {-45, 145},
    {29.4803, -88.6381},
    {-78.3251, -159.036},
}

func main() {
    for _, tc := range testCases {
        fmt.Println(tc.b2.Sub(tc.b1))
    }
}

func (b2 bearing) Sub(b1 bearing) bearing {
    switch d := b2 - b1; {
    case d < -180:
        return d + 360
    case d > 180:
        return d - 360
    default:
        return d
    }
}
Task: Approximate equality

C: #include <math.h>
#include <stdbool.h>
#include <stdio.h>

bool approxEquals(double value, double other, double epsilon) {
    return fabs(value - other) < epsilon;
}

void test(double a, double b) {
    double epsilon = 1e-18;
    printf("%f, %f => %d\n", a, b, approxEquals(a, b, epsilon));
}

int main() {
    test(100000000000000.01, 100000000000000.011);
    test(100.01, 100.011);
    test(10000000000000.001 / 10000.0, 1000000000.0000001000);
    test(0.001, 0.0010000001);
    test(0.000000000000000000000101, 0.0);
    test(sqrt(2.0) * sqrt(2.0), 2.0);
    test(-sqrt(2.0) * sqrt(2.0), -2.0);
    test(3.14159265358979323846, 3.14159265358979324);
    return 0;
}



C#: using System;

public static class Program
{
    public static void Main() {
        Test(100000000000000.01, 100000000000000.011);
        Test(100.01, 100.011);
        Test(10000000000000.001 / 10000.0, 1000000000.0000001000);
        Test(0.001, 0.0010000001);
        Test(0.000000000000000000000101, 0.0);
        Test(Math.Sqrt(2) * Math.Sqrt(2), 2.0);
        Test(-Math.Sqrt(2) * Math.Sqrt(2), -2.0);
        Test(3.14159265358979323846, 3.14159265358979324);

        void Test(double a, double b) {
            const double epsilon = 1e-18;
            WriteLine($"{a}, {b} => {a.ApproxEquals(b, epsilon)}");
        }
    }

    public static bool ApproxEquals(this double value, double other, double epsilon) => Math.Abs(value - other) < epsilon;
}
Task: Approximate equality

C: #include <math.h>
#include <stdbool.h>
#include <stdio.h>

bool approxEquals(double value, double other, double epsilon) {
    return fabs(value - other) < epsilon;
}

void test(double a, double b) {
    double epsilon = 1e-18;
    printf("%f, %f => %d\n", a, b, approxEquals(a, b, epsilon));
}

int main() {
    test(100000000000000.01, 100000000000000.011);
    test(100.01, 100.011);
    test(10000000000000.001 / 10000.0, 1000000000.0000001000);
    test(0.001, 0.0010000001);
    test(0.000000000000000000000101, 0.0);
    test(sqrt(2.0) * sqrt(2.0), 2.0);
    test(-sqrt(2.0) * sqrt(2.0), -2.0);
    test(3.14159265358979323846, 3.14159265358979324);
    return 0;
}


C++: #include <iomanip>
#include <iostream>
#include <cmath>

bool approxEquals(double a, double b, double e) {
    return fabs(a - b) < e;
}

void test(double a, double b) {
    constexpr double epsilon = 1e-18;
    std::cout << std::setprecision(21) << a;
    std::cout << ", ";
    std::cout << std::setprecision(21) << b;
    std::cout << " => ";
    std::cout << approxEquals(a, b, epsilon) << '\n';
}

int main() {
    test(100000000000000.01, 100000000000000.011);
    test(100.01, 100.011);
    test(10000000000000.001 / 10000.0, 1000000000.0000001000);
    test(0.001, 0.0010000001);
    test(0.000000000000000000000101, 0.0);
    test(sqrt(2.0) * sqrt(2.0), 2.0);
    test(-sqrt(2.0) * sqrt(2.0), -2.0);
    test(3.14159265358979323846, 3.14159265358979324);
    return 0;
}
Task: Approximate equality

C: #include <math.h>
#include <stdbool.h>
#include <stdio.h>

bool approxEquals(double value, double other, double epsilon) {
    return fabs(value - other) < epsilon;
}

void test(double a, double b) {
    double epsilon = 1e-18;
    printf("%f, %f => %d\n", a, b, approxEquals(a, b, epsilon));
}

int main() {
    test(100000000000000.01, 100000000000000.011);
    test(100.01, 100.011);
    test(10000000000000.001 / 10000.0, 1000000000.0000001000);
    test(0.001, 0.0010000001);
    test(0.000000000000000000000101, 0.0);
    test(sqrt(2.0) * sqrt(2.0), 2.0);
    test(-sqrt(2.0) * sqrt(2.0), -2.0);
    test(3.14159265358979323846, 3.14159265358979324);
    return 0;
}




Go: package main

import (
    "fmt"
    "log"
    "math/big"
)

func max(a, b *big.Float) *big.Float {
    if a.Cmp(b) > 0 {
        return a
    }
    return b
}

func isClose(a, b *big.Float) bool {
    relTol := big.NewFloat(1e-9) 
    t := new(big.Float)
    t.Sub(a, b)
    t.Abs(t)
    u, v, w := new(big.Float), new(big.Float), new(big.Float)
    u.Mul(relTol, max(v.Abs(a), w.Abs(b)))
    return t.Cmp(u) <= 0
}

func nbf(s string) *big.Float {
    n, ok := new(big.Float).SetString(s)
    if !ok {
        log.Fatal("invalid floating point number")
    }
    return n
}

func main() {
    root2 := big.NewFloat(2.0)
    root2.Sqrt(root2)
    pairs := [][2]*big.Float{
        {nbf("100000000000000.01"), nbf("100000000000000.011")},
        {nbf("100.01"), nbf("100.011")},
        {nbf("0").Quo(nbf("10000000000000.001"), nbf("10000.0")), nbf("1000000000.0000001000")},
        {nbf("0.001"), nbf("0.0010000001")},
        {nbf("0.000000000000000000000101"), nbf("0.0")},
        {nbf("0").Mul(root2, root2), nbf("2.0")},
        {nbf("0").Mul(nbf("0").Neg(root2), root2), nbf("-2.0")},
        {nbf("100000000000000003.0"), nbf("100000000000000004.0")},
        {nbf("3.14159265358979323846"), nbf("3.14159265358979324")},
    }
    for _, pair := range pairs {
        s := "≉"
        if isClose(pair[0], pair[1]) {
            s = "≈"
        }
        fmt.Printf("% 21.19g %s %- 21.19g\n", pair[0], s, pair[1])
    }
}