如何在Swift游乐场玩STDIN [英] How to take STDIN in Swift playground

问题描述

我知道要在STDIN和STDOUT中编程，我们需要在Xcode中创建一个命令行项目。
但是如何在操场上取标准输入。

I know that to program in STDIN and STDOUT, we need to make an command line project in Xcode. But how do I take a standard input in playground.

每当我尝试在游乐场中运行此类代码时

Whenever I try to run such code in playground

var input = readLine()!

我总是收到此错误

执行被中断，原因：EXC_BAD_INSTRUCTION
（代码= EXC_l386_INVOP，子代码= 0x0）

Execution was interrupted, reason: EXC_BAD_INSTRUCTION (Code=EXC_l386_INVOP, subcode=0x0)

是是否可以在游乐场参加STDIN？

Is it possible to take STDIN in playground or not?

更新

我知道这个错误是因为 nil 输入变量，但想知道如何克服这个nil值。

I know this error is because of nil input variable but want to know how to overcome this nil value.

推荐答案

SWIFT 3的固定解决方案

要使其正常工作，请创建新命令行工具项目。

To make it work, Create a new command line tool project.

转到文件 - >新建 - >项目 - >macOS - >命令行工具。

Go to "File" -> "New" -> "Project" -> "macOS" -> "Command Line Tool".

import Foundation

print("Hello, World!")


func solveMefirst(firstNo: Int , secondNo: Int) -> Int {
    return firstNo + secondNo
}

func input() -> String {
    let keyboard = FileHandle.standardInput
    let inputData = keyboard.availableData
    return NSString(data: inputData, encoding:String.Encoding.utf8.rawValue) as! String
}

let num1 = readLine()
let num2 = readLine()

var IntNum1 = Int(num1!)
var IntNum2 = Int(num2!)

print("Addition of numbers is :  \(solveMefirst(firstNo: IntNum1!, secondNo: IntNum2!))")

使用 CMD + R运行项目

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