WeixiangYan/CodeTransOcean huggingface dataset:
Task: Polyspiral





Java: import java.awt.*;
import java.awt.event.ActionEvent;
import javax.swing.*;

public class PolySpiral extends JPanel {
    double inc = 0;

    public PolySpiral() {
        setPreferredSize(new Dimension(640, 640));
        setBackground(Color.white);

        new Timer(40, (ActionEvent e) -> {
            inc = (inc + 0.05) % 360;
            repaint();
        }).start();
    }

    void drawSpiral(Graphics2D g, int len, double angleIncrement) {

        double x1 = getWidth() / 2;
        double y1 = getHeight() / 2;
        double angle = angleIncrement;

        for (int i = 0; i < 150; i++) {

            g.setColor(Color.getHSBColor(i / 150f, 1.0f, 1.0f));

            double x2 = x1 + Math.cos(angle) * len;
            double y2 = y1 - Math.sin(angle) * len;
            g.drawLine((int) x1, (int) y1, (int) x2, (int) y2);
            x1 = x2;
            y1 = y2;

            len += 3;

            angle = (angle + angleIncrement) % (Math.PI * 2);
        }
    }

    @Override
    public void paintComponent(Graphics gg) {
        super.paintComponent(gg);
        Graphics2D g = (Graphics2D) gg;
        g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                RenderingHints.VALUE_ANTIALIAS_ON);

        drawSpiral(g, 5, Math.toRadians(inc));
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(() -> {
            JFrame f = new JFrame();
            f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            f.setTitle("PolySpiral");
            f.setResizable(true);
            f.add(new PolySpiral(), BorderLayout.CENTER);
            f.pack();
            f.setLocationRelativeTo(null);
            f.setVisible(true);
        });
    }
}



Python: import math

import pygame
from pygame.locals import *

pygame.init()
screen = pygame.display.set_mode((1024, 600))

pygame.display.set_caption("Polyspiral")

incr = 0

running = True

while running:
	pygame.time.Clock().tick(60)
	for event in pygame.event.get():
		if event.type==QUIT:
			running = False
			break

	incr = (incr + 0.05) % 360
	x1 = pygame.display.Info().current_w / 2
	y1 = pygame.display.Info().current_h / 2
	length = 5
	angle = incr

	screen.fill((255,255,255))

	for i in range(1,151):
		x2 = x1 + math.cos(angle) * length
		y2 = y1 + math.sin(angle) * length
		pygame.draw.line(screen, (255,0,0), (x1, y1), (x2, y2), 1)
		
		x1, y1 = x2, y2
		length += 3
		angle = (angle + incr) % 360

	pygame.display.flip()
Task: Extend your language

C: 
#define if2(firsttest,secondtest,bothtrue,firsttrue,secondtrue,bothfalse)\
	switch(((firsttest)?0:2)+((secondtest)?0:1)) {\
		case 0: bothtrue; break;\
		case 1: firsttrue; break;\
		case 2: secondtrue; break;\
		case 3: bothfalse; break;\
	}




Go: package main

import "fmt"

type F func()

type If2 struct {cond1, cond2 bool}

func (i If2) else1(f F) If2 {
    if i.cond1 && !i.cond2 {
        f()
    }
    return i
}

func (i If2) else2(f F) If2 {
    if i.cond2 && !i.cond1 {
        f()
    }
    return i
}

func (i If2) else0(f F) If2 {
    if !i.cond1 && !i.cond2 {
        f()
    }
    return i
}

func if2(cond1, cond2 bool, f F) If2 {
    if cond1 && cond2 {
        f()
    }
    return If2{cond1, cond2}
}

func main() {
    a, b := 0, 1
    if2 (a == 1, b == 3, func() {
        fmt.Println("a = 1 and b = 3")
    }).else1 (func() {
        fmt.Println("a = 1 and b <> 3")
    }).else2 (func() {
        fmt.Println("a <> 1 and b = 3")
    }).else0 (func() {
        fmt.Println("a <> 1 and b <> 3")
    })

    
    a, b = 1, 0
    if2 (a == 1, b == 3, func() {
        fmt.Println("a = 1 and b = 3")
    }).else0 (func() {
        fmt.Println("a <> 1 and b <> 3")
    }).else1 (func() {
        fmt.Println("a = 1 and b <> 3")
    })
}
Task: Extend your language

C: 
#define if2(firsttest,secondtest,bothtrue,firsttrue,secondtrue,bothfalse)\
	switch(((firsttest)?0:2)+((secondtest)?0:1)) {\
		case 0: bothtrue; break;\
		case 1: firsttrue; break;\
		case 2: secondtrue; break;\
		case 3: bothfalse; break;\
	}





Java: public class If2 {

    public static void if2(boolean firstCondition, boolean secondCondition,
                           Runnable bothTrue, Runnable firstTrue, Runnable secondTrue, Runnable noneTrue) {
        if (firstCondition)
            if (secondCondition)
                bothTrue.run();
            else firstTrue.run();
        else if (secondCondition)
            secondTrue.run();
        else noneTrue.run();
    }
}
Task: Extend your language

C: 
#define if2(firsttest,secondtest,bothtrue,firsttrue,secondtrue,bothfalse)\
	switch(((firsttest)?0:2)+((secondtest)?0:1)) {\
		case 0: bothtrue; break;\
		case 1: firsttrue; break;\
		case 2: secondtrue; break;\
		case 3: bothfalse; break;\
	}







Python: a, b = 1, 0

if (c1 := a == 1) and (c2 := b == 3):
  print('a = 1 and b = 3')
elif c1:
  print('a = 1 and b <> 3')
elif c2:
  print('a <> 1 and b = 3')
else:
  print('a <> 1 and b <> 3')
Task: Extend your language




Go: package main

import "fmt"

type F func()

type If2 struct {cond1, cond2 bool}

func (i If2) else1(f F) If2 {
    if i.cond1 && !i.cond2 {
        f()
    }
    return i
}

func (i If2) else2(f F) If2 {
    if i.cond2 && !i.cond1 {
        f()
    }
    return i
}

func (i If2) else0(f F) If2 {
    if !i.cond1 && !i.cond2 {
        f()
    }
    return i
}

func if2(cond1, cond2 bool, f F) If2 {
    if cond1 && cond2 {
        f()
    }
    return If2{cond1, cond2}
}

func main() {
    a, b := 0, 1
    if2 (a == 1, b == 3, func() {
        fmt.Println("a = 1 and b = 3")
    }).else1 (func() {
        fmt.Println("a = 1 and b <> 3")
    }).else2 (func() {
        fmt.Println("a <> 1 and b = 3")
    }).else0 (func() {
        fmt.Println("a <> 1 and b <> 3")
    })

    
    a, b = 1, 0
    if2 (a == 1, b == 3, func() {
        fmt.Println("a = 1 and b = 3")
    }).else0 (func() {
        fmt.Println("a <> 1 and b <> 3")
    }).else1 (func() {
        fmt.Println("a = 1 and b <> 3")
    })
}


Java: public class If2 {

    public static void if2(boolean firstCondition, boolean secondCondition,
                           Runnable bothTrue, Runnable firstTrue, Runnable secondTrue, Runnable noneTrue) {
        if (firstCondition)
            if (secondCondition)
                bothTrue.run();
            else firstTrue.run();
        else if (secondCondition)
            secondTrue.run();
        else noneTrue.run();
    }
}
Task: Extend your language





Java: public class If2 {

    public static void if2(boolean firstCondition, boolean secondCondition,
                           Runnable bothTrue, Runnable firstTrue, Runnable secondTrue, Runnable noneTrue) {
        if (firstCondition)
            if (secondCondition)
                bothTrue.run();
            else firstTrue.run();
        else if (secondCondition)
            secondTrue.run();
        else noneTrue.run();
    }
}



Python: a, b = 1, 0

if (c1 := a == 1) and (c2 := b == 3):
  print('a = 1 and b = 3')
elif c1:
  print('a = 1 and b <> 3')
elif c2:
  print('a <> 1 and b = 3')
else:
  print('a <> 1 and b <> 3')
Task: Extend your language




Go: package main

import "fmt"

type F func()

type If2 struct {cond1, cond2 bool}

func (i If2) else1(f F) If2 {
    if i.cond1 && !i.cond2 {
        f()
    }
    return i
}

func (i If2) else2(f F) If2 {
    if i.cond2 && !i.cond1 {
        f()
    }
    return i
}

func (i If2) else0(f F) If2 {
    if !i.cond1 && !i.cond2 {
        f()
    }
    return i
}

func if2(cond1, cond2 bool, f F) If2 {
    if cond1 && cond2 {
        f()
    }
    return If2{cond1, cond2}
}

func main() {
    a, b := 0, 1
    if2 (a == 1, b == 3, func() {
        fmt.Println("a = 1 and b = 3")
    }).else1 (func() {
        fmt.Println("a = 1 and b <> 3")
    }).else2 (func() {
        fmt.Println("a <> 1 and b = 3")
    }).else0 (func() {
        fmt.Println("a <> 1 and b <> 3")
    })

    
    a, b = 1, 0
    if2 (a == 1, b == 3, func() {
        fmt.Println("a = 1 and b = 3")
    }).else0 (func() {
        fmt.Println("a <> 1 and b <> 3")
    }).else1 (func() {
        fmt.Println("a = 1 and b <> 3")
    })
}




Python: a, b = 1, 0

if (c1 := a == 1) and (c2 := b == 3):
  print('a = 1 and b = 3')
elif c1:
  print('a = 1 and b <> 3')
elif c2:
  print('a <> 1 and b = 3')
else:
  print('a <> 1 and b <> 3')
Task: Input loop

C: #include <stdlib.h>
#include <stdio.h>

char *get_line(FILE* fp)
{
	int len = 0, got = 0, c;
	char *buf = 0;

	while ((c = fgetc(fp)) != EOF) {
		if (got + 1 >= len) {
			len *= 2;
			if (len < 4) len = 4;
			buf = realloc(buf, len);
		}
		buf[got++] = c;
		if (c == '\n') break;
	}
	if (c == EOF && !got) return 0;

	buf[got++] = '\0';
	return buf;
}

int main()
{
	char *s;
	while ((s = get_line(stdin))) {
		printf("%s",s);
		free(s);
	}
	return 0;
}



C#: using System;
using System.IO;

class Program
{
    static void Main(string[] args)
    {
        
        

        using (var b = new StreamReader("file.txt"))
        {
            string line;
            while ((line = b.ReadLine()) != null)
                Console.WriteLine(line);
        }
    }
}
Task: Input loop

C: #include <stdlib.h>
#include <stdio.h>

char *get_line(FILE* fp)
{
	int len = 0, got = 0, c;
	char *buf = 0;

	while ((c = fgetc(fp)) != EOF) {
		if (got + 1 >= len) {
			len *= 2;
			if (len < 4) len = 4;
			buf = realloc(buf, len);
		}
		buf[got++] = c;
		if (c == '\n') break;
	}
	if (c == EOF && !got) return 0;

	buf[got++] = '\0';
	return buf;
}

int main()
{
	char *s;
	while ((s = get_line(stdin))) {
		printf("%s",s);
		free(s);
	}
	return 0;
}


C++: #include <istream>
#include <string>
#include <vector>
#include <algorithm>
#include <iostream>
#include <iterator>


template<class OutIt>
void read_words(std::istream& is, OutIt dest)
{
  std::string word;
  while (is >> word)
  {
    
    *dest = word;
  }
}


template<class OutIt>
void read_lines(std::istream& is, OutIt dest)
{
  std::string line;
  while (std::getline(is, line))
  {
    
    *dest = line;
  }
}

int main()
{
  
  read_words(std::cin, 
             std::ostream_iterator<std::string>(std::cout, " "));

  
  std::vector<std::string> v;
  read_lines(std::cin, std::back_inserter(v));
  
  return 0;
}
Task: Input loop

C: #include <stdlib.h>
#include <stdio.h>

char *get_line(FILE* fp)
{
	int len = 0, got = 0, c;
	char *buf = 0;

	while ((c = fgetc(fp)) != EOF) {
		if (got + 1 >= len) {
			len *= 2;
			if (len < 4) len = 4;
			buf = realloc(buf, len);
		}
		buf[got++] = c;
		if (c == '\n') break;
	}
	if (c == EOF && !got) return 0;

	buf[got++] = '\0';
	return buf;
}

int main()
{
	char *s;
	while ((s = get_line(stdin))) {
		printf("%s",s);
		free(s);
	}
	return 0;
}







Python: while(True):
      x = input("What is your age? ")
      print(x)
Task: Input loop


C++: #include <istream>
#include <string>
#include <vector>
#include <algorithm>
#include <iostream>
#include <iterator>


template<class OutIt>
void read_words(std::istream& is, OutIt dest)
{
  std::string word;
  while (is >> word)
  {
    
    *dest = word;
  }
}


template<class OutIt>
void read_lines(std::istream& is, OutIt dest)
{
  std::string line;
  while (std::getline(is, line))
  {
    
    *dest = line;
  }
}

int main()
{
  
  read_words(std::cin, 
             std::ostream_iterator<std::string>(std::cout, " "));

  
  std::vector<std::string> v;
  read_lines(std::cin, std::back_inserter(v));
  
  return 0;
}



Go: package main

import (
	"bufio"
	"io"
	"log"
	"os"
)

func main() {
	in := bufio.NewReader(os.Stdin)
	for {
		s, err := in.ReadString('\n')
		if err != nil {
			
			
			if err != io.EOF {
				log.Fatal(err)
			}
			break
		}
		
		
		_ = s
	}
}
Task: Input loop


C++: #include <istream>
#include <string>
#include <vector>
#include <algorithm>
#include <iostream>
#include <iterator>


template<class OutIt>
void read_words(std::istream& is, OutIt dest)
{
  std::string word;
  while (is >> word)
  {
    
    *dest = word;
  }
}


template<class OutIt>
void read_lines(std::istream& is, OutIt dest)
{
  std::string line;
  while (std::getline(is, line))
  {
    
    *dest = line;
  }
}

int main()
{
  
  read_words(std::cin, 
             std::ostream_iterator<std::string>(std::cout, " "));

  
  std::vector<std::string> v;
  read_lines(std::cin, std::back_inserter(v));
  
  return 0;
}




Java: import java.io.InputStream;
import java.util.Scanner;

public class InputLoop {
    public static void main(String args[]) {
        
        InputStream source = System.in;

        

        Scanner in = new Scanner(source);
        while(in.hasNext()){
            String input = in.next(); 

            
            System.out.println(input);
        }
    }
}
Task: Input loop



C#: using System;
using System.IO;

class Program
{
    static void Main(string[] args)
    {
        
        

        using (var b = new StreamReader("file.txt"))
        {
            string line;
            while ((line = b.ReadLine()) != null)
                Console.WriteLine(line);
        }
    }
}



Java: import java.io.InputStream;
import java.util.Scanner;

public class InputLoop {
    public static void main(String args[]) {
        
        InputStream source = System.in;

        

        Scanner in = new Scanner(source);
        while(in.hasNext()){
            String input = in.next(); 

            
            System.out.println(input);
        }
    }
}
Task: Input loop



C#: using System;
using System.IO;

class Program
{
    static void Main(string[] args)
    {
        
        

        using (var b = new StreamReader("file.txt"))
        {
            string line;
            while ((line = b.ReadLine()) != null)
                Console.WriteLine(line);
        }
    }
}





Python: while(True):
      x = input("What is your age? ")
      print(x)
Task: Input loop



C#: using System;
using System.IO;

class Program
{
    static void Main(string[] args)
    {
        
        

        using (var b = new StreamReader("file.txt"))
        {
            string line;
            while ((line = b.ReadLine()) != null)
                Console.WriteLine(line);
        }
    }
}






VB: Public Sub test()
    Dim filesystem As Object, stream As Object, line As String
    Set filesystem = CreateObject("Scripting.FileSystemObject")
    Set stream = filesystem.OpenTextFile("D:\test.txt")
    Do While stream.AtEndOfStream <> True
        line = stream.ReadLine
        Debug.Print line
    Loop
    stream.Close
End Sub
Task: Input loop





Java: import java.io.InputStream;
import java.util.Scanner;

public class InputLoop {
    public static void main(String args[]) {
        
        InputStream source = System.in;

        

        Scanner in = new Scanner(source);
        while(in.hasNext()){
            String input = in.next(); 

            
            System.out.println(input);
        }
    }
}



Python: while(True):
      x = input("What is your age? ")
      print(x)
Task: Input loop





Java: import java.io.InputStream;
import java.util.Scanner;

public class InputLoop {
    public static void main(String args[]) {
        
        InputStream source = System.in;

        

        Scanner in = new Scanner(source);
        while(in.hasNext()){
            String input = in.next(); 

            
            System.out.println(input);
        }
    }
}




VB: Public Sub test()
    Dim filesystem As Object, stream As Object, line As String
    Set filesystem = CreateObject("Scripting.FileSystemObject")
    Set stream = filesystem.OpenTextFile("D:\test.txt")
    Do While stream.AtEndOfStream <> True
        line = stream.ReadLine
        Debug.Print line
    Loop
    stream.Close
End Sub
Task: Input loop







Python: while(True):
      x = input("What is your age? ")
      print(x)


VB: Public Sub test()
    Dim filesystem As Object, stream As Object, line As String
    Set filesystem = CreateObject("Scripting.FileSystemObject")
    Set stream = filesystem.OpenTextFile("D:\test.txt")
    Do While stream.AtEndOfStream <> True
        line = stream.ReadLine
        Debug.Print line
    Loop
    stream.Close
End Sub
Task: Input loop

C: #include <stdlib.h>
#include <stdio.h>

char *get_line(FILE* fp)
{
	int len = 0, got = 0, c;
	char *buf = 0;

	while ((c = fgetc(fp)) != EOF) {
		if (got + 1 >= len) {
			len *= 2;
			if (len < 4) len = 4;
			buf = realloc(buf, len);
		}
		buf[got++] = c;
		if (c == '\n') break;
	}
	if (c == EOF && !got) return 0;

	buf[got++] = '\0';
	return buf;
}

int main()
{
	char *s;
	while ((s = get_line(stdin))) {
		printf("%s",s);
		free(s);
	}
	return 0;
}




Go: package main

import (
	"bufio"
	"io"
	"log"
	"os"
)

func main() {
	in := bufio.NewReader(os.Stdin)
	for {
		s, err := in.ReadString('\n')
		if err != nil {
			
			
			if err != io.EOF {
				log.Fatal(err)
			}
			break
		}
		
		
		_ = s
	}
}
Task: Input loop

C: #include <stdlib.h>
#include <stdio.h>

char *get_line(FILE* fp)
{
	int len = 0, got = 0, c;
	char *buf = 0;

	while ((c = fgetc(fp)) != EOF) {
		if (got + 1 >= len) {
			len *= 2;
			if (len < 4) len = 4;
			buf = realloc(buf, len);
		}
		buf[got++] = c;
		if (c == '\n') break;
	}
	if (c == EOF && !got) return 0;

	buf[got++] = '\0';
	return buf;
}

int main()
{
	char *s;
	while ((s = get_line(stdin))) {
		printf("%s",s);
		free(s);
	}
	return 0;
}





Java: import java.io.InputStream;
import java.util.Scanner;

public class InputLoop {
    public static void main(String args[]) {
        
        InputStream source = System.in;

        

        Scanner in = new Scanner(source);
        while(in.hasNext()){
            String input = in.next(); 

            
            System.out.println(input);
        }
    }
}
Task: Input loop

C: #include <stdlib.h>
#include <stdio.h>

char *get_line(FILE* fp)
{
	int len = 0, got = 0, c;
	char *buf = 0;

	while ((c = fgetc(fp)) != EOF) {
		if (got + 1 >= len) {
			len *= 2;
			if (len < 4) len = 4;
			buf = realloc(buf, len);
		}
		buf[got++] = c;
		if (c == '\n') break;
	}
	if (c == EOF && !got) return 0;

	buf[got++] = '\0';
	return buf;
}

int main()
{
	char *s;
	while ((s = get_line(stdin))) {
		printf("%s",s);
		free(s);
	}
	return 0;
}








VB: Public Sub test()
    Dim filesystem As Object, stream As Object, line As String
    Set filesystem = CreateObject("Scripting.FileSystemObject")
    Set stream = filesystem.OpenTextFile("D:\test.txt")
    Do While stream.AtEndOfStream <> True
        line = stream.ReadLine
        Debug.Print line
    Loop
    stream.Close
End Sub
Task: Input loop


C++: #include <istream>
#include <string>
#include <vector>
#include <algorithm>
#include <iostream>
#include <iterator>


template<class OutIt>
void read_words(std::istream& is, OutIt dest)
{
  std::string word;
  while (is >> word)
  {
    
    *dest = word;
  }
}


template<class OutIt>
void read_lines(std::istream& is, OutIt dest)
{
  std::string line;
  while (std::getline(is, line))
  {
    
    *dest = line;
  }
}

int main()
{
  
  read_words(std::cin, 
             std::ostream_iterator<std::string>(std::cout, " "));

  
  std::vector<std::string> v;
  read_lines(std::cin, std::back_inserter(v));
  
  return 0;
}







VB: Public Sub test()
    Dim filesystem As Object, stream As Object, line As String
    Set filesystem = CreateObject("Scripting.FileSystemObject")
    Set stream = filesystem.OpenTextFile("D:\test.txt")
    Do While stream.AtEndOfStream <> True
        line = stream.ReadLine
        Debug.Print line
    Loop
    stream.Close
End Sub
Task: Input loop




Go: package main

import (
	"bufio"
	"io"
	"log"
	"os"
)

func main() {
	in := bufio.NewReader(os.Stdin)
	for {
		s, err := in.ReadString('\n')
		if err != nil {
			
			
			if err != io.EOF {
				log.Fatal(err)
			}
			break
		}
		
		
		_ = s
	}
}




Python: while(True):
      x = input("What is your age? ")
      print(x)
Task: Input loop




Go: package main

import (
	"bufio"
	"io"
	"log"
	"os"
)

func main() {
	in := bufio.NewReader(os.Stdin)
	for {
		s, err := in.ReadString('\n')
		if err != nil {
			
			
			if err != io.EOF {
				log.Fatal(err)
			}
			break
		}
		
		
		_ = s
	}
}





VB: Public Sub test()
    Dim filesystem As Object, stream As Object, line As String
    Set filesystem = CreateObject("Scripting.FileSystemObject")
    Set stream = filesystem.OpenTextFile("D:\test.txt")
    Do While stream.AtEndOfStream <> True
        line = stream.ReadLine
        Debug.Print line
    Loop
    stream.Close
End Sub
Task: Input loop


C++: #include <istream>
#include <string>
#include <vector>
#include <algorithm>
#include <iostream>
#include <iterator>


template<class OutIt>
void read_words(std::istream& is, OutIt dest)
{
  std::string word;
  while (is >> word)
  {
    
    *dest = word;
  }
}


template<class OutIt>
void read_lines(std::istream& is, OutIt dest)
{
  std::string line;
  while (std::getline(is, line))
  {
    
    *dest = line;
  }
}

int main()
{
  
  read_words(std::cin, 
             std::ostream_iterator<std::string>(std::cout, " "));

  
  std::vector<std::string> v;
  read_lines(std::cin, std::back_inserter(v));
  
  return 0;
}


C#: using System;
using System.IO;

class Program
{
    static void Main(string[] args)
    {
        
        

        using (var b = new StreamReader("file.txt"))
        {
            string line;
            while ((line = b.ReadLine()) != null)
                Console.WriteLine(line);
        }
    }
}
Task: Input loop


C++: #include <istream>
#include <string>
#include <vector>
#include <algorithm>
#include <iostream>
#include <iterator>


template<class OutIt>
void read_words(std::istream& is, OutIt dest)
{
  std::string word;
  while (is >> word)
  {
    
    *dest = word;
  }
}


template<class OutIt>
void read_lines(std::istream& is, OutIt dest)
{
  std::string line;
  while (std::getline(is, line))
  {
    
    *dest = line;
  }
}

int main()
{
  
  read_words(std::cin, 
             std::ostream_iterator<std::string>(std::cout, " "));

  
  std::vector<std::string> v;
  read_lines(std::cin, std::back_inserter(v));
  
  return 0;
}






Python: while(True):
      x = input("What is your age? ")
      print(x)
Task: Input loop



C#: using System;
using System.IO;

class Program
{
    static void Main(string[] args)
    {
        
        

        using (var b = new StreamReader("file.txt"))
        {
            string line;
            while ((line = b.ReadLine()) != null)
                Console.WriteLine(line);
        }
    }
}


Go: package main

import (
	"bufio"
	"io"
	"log"
	"os"
)

func main() {
	in := bufio.NewReader(os.Stdin)
	for {
		s, err := in.ReadString('\n')
		if err != nil {
			
			
			if err != io.EOF {
				log.Fatal(err)
			}
			break
		}
		
		
		_ = s
	}
}
Task: Input loop




Go: package main

import (
	"bufio"
	"io"
	"log"
	"os"
)

func main() {
	in := bufio.NewReader(os.Stdin)
	for {
		s, err := in.ReadString('\n')
		if err != nil {
			
			
			if err != io.EOF {
				log.Fatal(err)
			}
			break
		}
		
		
		_ = s
	}
}


Java: import java.io.InputStream;
import java.util.Scanner;

public class InputLoop {
    public static void main(String args[]) {
        
        InputStream source = System.in;

        

        Scanner in = new Scanner(source);
        while(in.hasNext()){
            String input = in.next(); 

            
            System.out.println(input);
        }
    }
}
Task: Input loop

C: #include <stdlib.h>
#include <stdio.h>

char *get_line(FILE* fp)
{
	int len = 0, got = 0, c;
	char *buf = 0;

	while ((c = fgetc(fp)) != EOF) {
		if (got + 1 >= len) {
			len *= 2;
			if (len < 4) len = 4;
			buf = realloc(buf, len);
		}
		buf[got++] = c;
		if (c == '\n') break;
	}
	if (c == EOF && !got) return 0;

	buf[got++] = '\0';
	return buf;
}

int main()
{
	char *s;
	while ((s = get_line(stdin))) {
		printf("%s",s);
		free(s);
	}
	return 0;
}






PHP: $fh = fopen($filename, 'r');
if ($fh) {
    while (!feof($fh)) {
        $line = rtrim(fgets($fh)); # removes trailing newline
        # process $line
    }
    fclose($fh);
}