Windows 環境請使用 CMD 作為終端機執行程式碼與編譯。

StdIn 範例

範例輸入資料

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範例輸出資料

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範例程式碼

Python 程式碼

Windows 上 Python會有些功能無法與其他OS產生相同結果
請勿使用字串檔案路徑，請使用例如os等內建函式庫

main.py

import sys

for line in sys.stdin.read().splitlines():
    # splitlines 會去除不同OS的換行符號
    nums = [int(num) for num in line.split()]
    # nums = map(int, line.split())
    print(sum(nums))

$ python main.py < in.txt

Java 程式碼

Main.java

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        while (scanner.hasNextLine()) {
            String input = scanner.nextLine().strip();
            String[] nums = input.split(" ");
            Integer result = 0;
            for(String s: nums) {
                result += Integer.parseInt(s);
            }
            System.out.println(result);
        }
        scanner.close();
    }
}

$ javac Main.java
$ java Main < in.txt

C 程式碼

main.c

#include<stdio.h>

int main(){
	int a, b;
	while(!feof(stdin) && scanf("%d %d", &a, &b)){
		printf("%d\n", a+b);
	}
}

$ gcc main.c -o main
$ ./main < in.txt

C++ 程式碼

main.cpp

#include<iostream>

using namespace std;

int main(){
	int a, b;
	while(cin >> a >> b){
		cout << a + b << endl;
	}
}

$ g++ main.cpp -o main
$ ./main < in.txt

PHP 程式碼

main.php

<?php
    $handle = fopen('php://stdin', 'r');

    while($line = fgets($handle)){
        [$a, $b] = explode(' ', $line);
        echo intval($a) + intval($b);
        echo PHP_EOL;
    }

<?php

$data = explode(PHP_EOL, trim(stream_get_contents(STDIN)));

foreach ($data as $item) {
  [$a, $b] = explode(' ', $item);
  echo (intval($a) + intval($b)) . PHP_EOL;
}

$ php main.php < in.txt

Rust 程式碼

main.rs

use std::io;
use std::io::BufRead;

fn main() {
    for line in io::stdin().lock().lines() {
        let input = line.unwrap();
        let nums: Vec<&str> = input.trim().split(' ').collect();
        let result: i32 = nums
            .into_iter()
            .map(|x| x.parse::<i32>().unwrap())
            .sum();
        println!("{}", result);
    }
}

$ cargo build
$ cargo run < in.txt

Go 程式碼

package main

import (
  "bufio"
  "fmt"
  "log"
  "os"
  "strconv"
  "strings"
)

func main() {
  scanner := bufio.NewScanner(os.Stdin)
  for scanner.Scan() {
    result := 0
    numbers := strings.Fields(scanner.Text())

    for _, num := range numbers {
      n, _ := strconv.Atoi(num)
      result += n
    }

    fmt.Println(result)
  }

  if scanner.Err() != nil {
    log.Fatalln("Scanner Fail.")
  }
}

Javascript 程式碼

main.js

process.stdin.resume();
process.stdin.setEncoding('utf8');

process.stdin.on('data', processLine => {
    processLine.toString('utf-8').split('\n')
        .map(x => x.trim())
        .filter(x => !!x)
        .map(data => {
            console.log(data.split(' ').reduce((x, y) => +x + +y))
        })
})

$ node main.js < in.txt

Typescript 程式碼

$ npm install -g typescript

tsc

main.ts

declare const process: any;

process.stdin.resume();
process.stdin.setEncoding('utf8');

process.stdin.on('data', processLine => {
    processLine.toString('utf-8').split('\n')
        .map(x => x.trim())
        .filter(x => !!x)
        .map(data => {
            console.log(data.split(' ').map(i => +i).reduce((x, y) => x + y))
        });
});

$ tsc main.ts --outFile maints.js
$ node maints.js < in.txt

Kotlin 程式碼

fun main() {
    generateSequence(::readLine)
        .map { it.split(" ").map(String::toInt).sum() }
        .forEach(::println)
}

Swift 程式碼

import Foundation

while let line: String = readLine() {
    let result: Int = line.trimmingCharacters(in: .whitespacesAndNewlines)
                        .split(separator: " ")
                        .map{Int($0)!}
                        .reduce(0, +)
    print(result)
}

$ swift main.swift < in.txt

VB .Net 程式碼

• VB .Net 2010 (Mono VB for Linux)

Mono VB 函式庫需要額外Import
即VB寫法會與visual studio有些差異

例如：ArrayList
必須用 Imports System.Collections

main.vb

Module Module1

    Sub Main()
        While True
            Dim Input As String = Console.ReadLine()
            If Input Is Nothing Then Exit While

            Dim Data() As Integer = Input.Split(" ").Select(Function(x) CInt(x)).ToArray
            Dim A As Integer = Data(0)
            Dim B As Integer = Data(1)
            Dim Output As Integer = A + B
            Console.WriteLine(Output)

        End While
    End Sub

End Module

$ vbc main.vb 編譯程式碼

$ main < in.txt for windows

$ mono main.exe < in.txt for mono

$ vbc main.vb -out:main.exe
$ mono main.exe < in.txt

C# 程式碼

• Mono C# for Linux

main.cs

using System;
using System.Linq;

public class Test
{
	public static void Main()
	{
		string line = Console.ReadLine();
        while(line != null){
            int[] nums = line.Split(' ').Select(x => Int32.Parse(x)).ToArray();
            Console.WriteLine(nums[0] + nums[1]);
            line = Console.ReadLine();
        }
	}
}

$ csc main.cs
$ ./main < in.txt

$ mcs main.cs -out:main.exe
$ mono main.exe < in.txt

Ruby 程式碼

• Ruby 2.5

Windows 上 Ruby會有些功能無法正常運作

main.rb

ARGF.each do |input|
    puts input.split.map(&:to_i).sum
end

$ ruby main.rb < in.txt