Question

有人可以请我帮忙，它是我第三天学习JS而我试图添加do while循环直到摇滚，纸张或剪刀进入提示但似乎它不起作用，试图找出它现在几个小时......有了这个代码提示总是出现无关紧要。

// a. User makes a choice
var userChoice = prompt("Do you choose ROCK, PAPER or SCISSORS?");
do {
  userChoice = prompt("Do you choose ROCK, PAPER or SCISSORS?");
}
while (userChoice != "rock" && userChoice != "paper" && "scissors");
var computerChoice = Math.random();

// b. Computer makes a choice
if (computerChoice <= 0.33) {
  computerChoice = "rock";
} else if (computerChoice <= 0.67) {
  computerChoice = "paper";
} else {
  computerChoice = "scissors";
}
var choice1 = userChoice;
var choice2 = computerChoice;

// c. A compare function will determine who wins
function compare (choice1, choice2){
  if (choice1 === choice2){
    alert("A tie!");
  }
else if (choice1 === "rock"){
  if (choice2 === "paper"){
    alert("Computer chose PAPER, you LOSE!");
  } else
      alert("Computer chose SCISSORS, you WIN!");
  }
else if (choice1 === "paper"){
  if (choice2 === "scissors"){
    alert("Computer chose SCISSORS, you LOSE!");
  } else
      alert("Computer chose ROCK, you WIN!");
  }
else if (choice1 === "scissors"){
  if (choice2 === "rock"){
    alert ("Computer chose ROCK, you lose!");
  } else
      alert("Computer chose PAPER, you WIN!");
  }
}
compare (userChoice, computerChoice);
console.log("You chose:", choice1, "||", "Computer chose:", choice2);

Answer 1

始终显示

提示，因为

pod install

始终评估为true。你可能想要

import TCPickerView

Answer 2

您的代码中存在以下几个问题：

userChoice条件<{1}}内的and比较中缺少变量名称while
当代码运行（在第一行）和do块内时，您不需要提示用户选择。您只需在do块中提示用户选择。

var userChoice;
do {
  userChoice = prompt("Do you choose ROCK, PAPER or SCISSORS?");
}
while (userChoice != "rock" && userChoice != "paper" && userChoice != "scissors");
var computerChoice = Math.random();

// b. Computer makes a choice
if (computerChoice <= 0.33) {
  computerChoice = "rock";
} else if (computerChoice <= 0.67) {
  computerChoice = "paper";
} else {
  computerChoice = "scissors";
}
var choice1 = userChoice;
var choice2 = computerChoice;

// c. A compare function will determine who wins
function compare (choice1, choice2){
  if (choice1 === choice2){
    alert("A tie!");
  }
else if (choice1 === "rock"){
  if (choice2 === "paper"){
    alert("Computer chose PAPER, you LOSE!");
  } else
      alert("Computer chose SCISSORS, you WIN!");
  }
else if (choice1 === "paper"){
  if (choice2 === "scissors"){
    alert("Computer chose SCISSORS, you LOSE!");
  } else
      alert("Computer chose ROCK, you WIN!");
  }
else if (choice1 === "scissors"){
  if (choice2 === "rock"){
    alert ("Computer chose ROCK, you lose!");
  } else
      alert("Computer chose PAPER, you WIN!");
  }
}
compare (userChoice, computerChoice);
console.log("You chose:", choice1, "||", "Computer chose:", choice2);

JavaScript（ROCK，PAPER，SCISSORS）会在提示

2 个答案: