---
title: 程式輸入輸出範例
tags: code, vb.net, python, ruby, java
---

:::info
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

22 1
23 1
24 1

## 範例輸出資料

23
24
25

---

## 範例程式碼

### Python 程式碼

:::danger
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

<!-- :::info
- Deno 1.0
:::

const buf = new Uint8Array(1024);
const n = await Deno.stdin.read(buf); 
if (n !== null) {
    const lines = new TextDecoder().decode(buf.subarray(0, n));
    lines.split('\n')
        .map(x => x.trim())
        .filter(x => !!x)
        .map(data => {
            console.log(data.split(' ').reduce((x, y) => +x + +y, 0));
        })
}

`$ deno run main.ts < in.txt` -->

:::info
`$ 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

:::info
- VB .Net 2010 (Mono VB for Linux)
:::

:::danger
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

:::info
- 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

:::info
- Ruby 2.5
:::

:::danger
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`