Question

所以我试图创建这个Rock，Paper，Scissors程序在telnet服务器上运行。除非它不允许我输入单词＆＃34; Rock＆＃34;，＆＃34; Paper＆＃34;或＆＃34;剪刀＆＃34;。

第一个CPUhand显示为未定义，并且未设置为if语句中的某个选项。
每当我在命令提示符中输入单个字符时，它会给我我的＆＃34;无效，再试一次！＆＃34; else语句并跳到下一行。

是否有人能够弄清楚为什么我的CPUhand的if语句不起作用或为什么我不能在命令提示符下输入多个字符？

＆＃13;

"use strict"; 
const 
  net = require('net'), 
  server = net.createServer(function(connection) { //create server
      
      let randomNum = randomNumber(1, 3);
      let CPUhand
      
      if(randomNum == 1){
          CPUhand == "Rock";
      } else if(randomNum == 2){
          CPUhand == "Paper";
      } else if(randomNum == 3){
          CPUhand == "Scissors";
      }
    
	connection.write("Enter: Rock, Paper, or Scissors!\r\n");
      
	connection.on('data', function(chunk) { //collect data from user
		
		let USERhand = chunk.toString();
		
		if(CPUhand === "Rock" && USERhand === "Scissors" || USERhand === "Rock" && CPUhand === "Scissors"){
			connection.write("Rock beats Scissors!\r\n");
		} 
		else if(CPUhand === "Paper" && USERhand === "Rock" || USERhand === "Paper" && CPUhand === "Rock"){
			connection.write("Paper beats Rock!\r\n");
		} 
		else if(CPUhand === "Scissors" && USERhand === "Paper" || USERhand === "Scissors" && CPUhand === "Paper"){
			connection.write("Scissors beats Paper!\r\n");
		}
        else if(CPUhand === USERhand){
            connection.write("Draw!\r\n");
        }
		else{
			connection.write("Invalid! Try Again! \r\n");
		}		
		
	});

}); server.listen(5432); //bind port

    function randomNumber(min, max) {
        min = Math.ceil(min);
        max = Math.floor(max);
        return Math.floor(Math.random() * (max - min + 1)) + min;
    }

＆＃13;

Answer 1

1）块中的错字：

if(randomNum == 1){ CPUhand == "Rock"; } else ...

应该是：

if(randomNum == 1){ CPUhand = "Rock"; } else ...

2）在用户输入中，您还有换行符号：

let USERhand = chunk.toString();

替换为：

let USERhand = chunk.toString().trim();

Node.js：telnet＆＃34; Rock，Paper，Scissors＆＃34;程序无效

1 个答案: