dartpad不支持I/O吗?

Does dartpad not support I/O?

最近我在 DartPad 上尝试了“Dart For Absolute Beginners”中的一些代码片段。 具体来说:

import 'dart:math';
import 'dart:io';

void main() 
{
    int guess;
    Random rand = new Random(); //create a random number generator
    int answer = rand.nextInt(100); //gets a random integer from 0 to 99
    
    do 
    {
        print("Enter your guess:");
        String temp = stdin.readLineSync(); //read in from the keyboard
        guess = int.parse(temp); //convert String to integer
        if (guess < answer)  
        {
            print("Too low!");
        } 
        else if (guess > answer)  
        {
            print("Too high!");
        }
    }
   
    while (guess != answer);
    
    print("You got it!");
}

但是在 运行ning 时,它显示错误“编译到 JavaScript 时出错: 不支持的导入:dart:io"

所以我的问题是

难道我们不能在 DartPad 上进行 运行 I/O 操作,我们需要一个完整的编辑器吗? 还是有其他问题??

DartPad 不支持 dart:io 库。但是你可以使用 this Dart 编译器,它支持 dart:io.

dart:io documentation 中所述:

Important: Browser-based apps can't use this library. Only the following can import and use the dart:io library:

  • Servers
  • Command-line scripts
  • Flutter mobile apps
  • Flutter desktop apps