Question

一些javascript代码基于Codecademy的JavaScript轨道上的Build“Rock，Paper，Scissors”课程。“剪刀”按钮有效，但“摇滚和”纸张“都显示”错误！“消息。

HTML code：

<!DOCTYPE html>
<html>
<head>
<script type="text/javascript" src="script.js"></script>
</head>
<body>
    <h1>Rock, Paper, Scissors</h1>
    <button onClick='choose("rock")'>Rock</button>
    <button onClick='choose("paper")'>Paper</button>
    <button onClick='choose("scissors")'>Scissors</button><br>
    <button onClick='compare(user, computerChoice)'>Go!</button>
    <p id="result"></p>
</body>
</html>

Javascript代码：

var user;
var choose = function(choice) {
    user = choice;
}

var computerChoice = Math.random();
if (computerChoice < 0.34) {
    computerChoice = "rock";
}
else if (computerChoice < 0.67) {
    computerChoice = "paper";
}   
else {
    computerChoice = "scissors";
}

var compare = function(choice1, choice2) {
    if (choice1 === choice2) {
        document.getElementById("result").innerHTML = "Tie!";
    }
    else if (choice1 === "rock") {
        if (choice2 === "scissors") {
            document.getElementById("result").innerHTML = "You Win!";
        }
        else {
            document.getElementById("result").innerHTML = "You Lose!";
        }
    }
    if (choice1 === "paper") {
        if (choice2 === "rock") {
            document.getElementById("result").innerHTML = "You Win!";
        }
        else if (choice2 ==="scissors") {
            document.getElementById("result").innerHTML = "You Lose!";
        }
    }
    if (choice1 === "scissors") {
        if (choice2 === "rock") {
            document.getElementById("result").innerHTML = "You Lose!";
        }
        else if (choice2 === "paper") {
            document.getElementById("result").innerHTML = "You Win!";
        }
    }
    else {
        document.getElementById("result").innerHTML = "ERROR!";
    }
}

Answer 1

乍一看，看起来你错过了其他几个如果......

var user;
var choose = function(choice) {
    user = choice;
}

var computerChoice = Math.random();
if (computerChoice < 0.34) {
    computerChoice = "rock";
}
else if (computerChoice < 0.67) {
    computerChoice = "paper";
}   
else {
    computerChoice = "scissors";
}

var compare = function(choice1, choice2) {
    if (choice1 === choice2) {
        document.getElementById("result").innerHTML = "Tie!";
    }
    else if (choice1 === "rock") {
        if (choice2 === "scissors") {
            document.getElementById("result").innerHTML = "You Win!";
        }
        else {
            document.getElementById("result").innerHTML = "You Lose!";
        }
    }
    else if (choice1 === "paper") {
        if (choice2 === "rock") {
            document.getElementById("result").innerHTML = "You Win!";
        }
        else if (choice2 ==="scissors") {
            document.getElementById("result").innerHTML = "You Lose!";
        }
    }
    else if (choice1 === "scissors") {
        if (choice2 === "rock") {
            document.getElementById("result").innerHTML = "You Lose!";
        }
        else if (choice2 === "paper") {
            document.getElementById("result").innerHTML = "You Win!";
        }
    }
    else {
        document.getElementById("result").innerHTML = "ERROR!";
    }
}

Answer 2

对于choice1，你没有使用“else if”用于摇滚和剪刀。因此，如果choice1不是剪刀，则始终会调用带错误的else条件。

Answer 3

这是我的工作，我再次发布它，因为我做了一些小改动

<HTML>
<HEAD><TITLE></TITLE>
<META http-equiv=Content-Type content="text/html; charset=UTF-8">
<STYLE type=text/CSS>
.s{font-size:60px}
.b{font-size:75px;background-color:##FF4000;height:85px}
</STYLE>
<SCRIPT type="text/javascript">
var p=['Rock','Scissors','Paper',['win','&#10004;'],['lose','&#9760;']]

function g(n){ document.getElementById('g').innerHTML=p[n]; var cp=[0,1,2]
    cp.sort(function(a,b){return Math.random()-0.5});
    r=Math.floor(3*(Math.random()));
    document.getElementById('i').innerHTML=p[cp[r]];r=cp[r];
    if(r===n){w(1); return} 
    else if((r===0 && n===1) || (r===1 && n==2) || (r==2 && n===0)){w(2)}
    else{w(0)}

}
function w(w){
pf=document.getElementById('gam'); pftr=pf.getElementsByTagName('tr');pftd=pf.getElementsByTagName('td');
    for(b=0;b<3;b++){pftd[b].innerHTML='&nbsp;'} w===1?pftd[w].innerHTML='tie':pftd[w].innerHTML='win'
}
</SCRIPT>
<META content="MSHTML 6.00.2900.2963" name=GENERATOR></HEAD>
<BODY scroll="auto">
<OBJECT ID="VoiceObj" CLASSID="clsid:96749377-3391-11D2-9EE3-00C04F797396" ></OBJECT>
<TABLE BORDER=0 style="height:200px;width:500px;text-align:center;font-size:50px" id="gam">
 <TR>
  <TD width="33%">  </TD><TD rowspan=2 id="ww">  </TD><TD width="33%" >  </TD>
 </TR>
 <TR>
  <TD id="g">  </TD><TD id="i">  </TD>
 </TR>
</TABLE>
<TABLE BORDER=1 style="border-collapse:collapse" cellpadding=0 >
<TR>

   &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Player
   &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
   &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
   &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
   &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
   &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
   &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
   &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
   &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
   &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
   &nbsp;&nbsp;&nbsp;&nbsp;Computer


    </TR>
 <TR>
 </Table>
<hr style="margin:30px">
<TABLE BORDER=1 style="border-collapse:collapse" cellpadding=0 >

   <TD><input type="button" class="b" value="Paper" onclick="g(2)"></TD>
  <TD><input type="button" class="b" value="Rock" onclick="g(0)"></TD>
  <TD><input type="button" class="b" value="Scissors" onclick="g(1)"></TD>

 </TR>
</TABLE>



</BODY></HTML>

HTML / javascript摇滚，纸张，剪刀游戏无法正常工作

3 个答案: