第7/9课错误

Question

我已经被困在7/9天两个晚上了。这是一个摇滚剪刀游戏。我不知道是怎么回事。我试了一下在线衣领，它还说我的第22行是一个错误(期望是一个标识符，而不是看到“tried”)。按照说明，如果在比较函数中的现有代码中，我还编写了另一个代码。

我的代码：

var userChoice = prompt("Do you choose rock, paper or scissors?");
var computerChoice = Math.random();
if (computerChoice < 0.34) {
computerChoice ="rock"
} else if(computerChoice <= 0.67) {
computerChoice ="paper";
} else {
    computerChoice ="scissors";
} console.log("Computer: " + computerChoice);
var compare=function(choice1, choice2){
if(choice1 === choice2) {
    return("The result is a tie!");
}
else if(choice1 ==="rock"){
    if(choice2 ==="scissors")
    return("rock wins");
}
else{
    return"paper wins";
}
    else if(choice1 ==="paper");{
    if(choice2 ==="rock")
    return("paper wins");
}
else{
    return"scissors wins";
}
}

Answer 1

我在您的代码中看到了几个语法错误。它应该如下所示：

var userChoice = prompt("Do you choose rock, paper or scissors?");
var computerChoice = Math.random();

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

console.log("Computer: " + computerChoice);

var compare = function(choice1, choice2) {
  if(choice1 === choice2) {
    return("The result is a tie!");
  } else if(choice1 === "rock") {
    if(choice2 === "scissors") {
      return("rock wins");
    } else {
      return "paper wins";
    }
  } else if(choice1 ==="paper") {
    if(choice2 ==="rock") {
      return("paper wins");
    } else {
      return"scissors wins";
    }
  }
}

Answer 2

 else if(choice1 ==="paper");{
    if(choice2 ==="rock")
    return("paper wins");
 }

你要终止你是else if在;的条件下

它应该是：

else if(choice1 ==="paper"){
        if(choice2 ==="rock")
        return("paper wins");
}

Answer 3

var userChoice = prompt("Do you choose rock, paper or scissors?");
var computerChoice = Math.random();
if (computerChoice < 0.34) {
computerChoice ="rock"
} else if(computerChoice <= 0.67) {
computerChoice ="paper";
} else {
    computerChoice ="scissors";
} console.log("Computer: " + computerChoice);
var compare=function(choice1, choice2){
if(choice1 === choice2) {
    return("The result is a tie!");
}
else if(choice1 ==="rock"){
    if(choice2 ==="scissors")
    return("rock wins");
}
else{
    return"paper wins";
}
    else if(choice1 ==="paper");{ -- on this there is semicolon after elseif block.. and how come else if is there after else block.. 
    if(choice2 ==="rock")
    return("paper wins");
}
else{
    return"scissors wins";
}
}