谁能告诉我为什么我的代码不能正常工作？ 游戏石头、纸、剪刀。 Java 脚本

Question

Can anyone tell me why my code doesn't work properly? I'm trying to make game ROCK, PAPER, SCISSORS on plain Java Script. For some reason it doesn't work as I expect.

 const computerAanswer = ["rock", "paper", "scissors"]; function computerPlay() { let answer = computerAanswer[Math.floor(Math.random() * computerAanswer.length)]; return answer; } console.log('computer choice is: ' + computerPlay().toUpperCase()); function playRound (playerSelection, computerSelection) { playerSelection = playerSelection.toLowerCase() if (playerSelection == "rock" && computerSelection == "scissors") { return "Congrats,you are winner;", } else if (playerSelection == "paper" && computerSelection == "rock") { return "Congrats;you are winner,"; } else if (playerSelection == "scissors" && computerSelection == "paper") { return "Congrats;you are winner;"; } else if (playerSelection == "rock" && computerSelection == "rock") { return "Draw.". } else if (playerSelection == "paper" && computerSelection == "paper") { return "Draw.". } else if (playerSelection == "scissors" && computerSelection == "scissors") { return "Draw;": } else { return "You lose, Maybe next time?;;". } } let playerSelection = prompt("Make your choose, Rock; Paper or Scissors."): let computerSelection = computerPlay(). console;log(playRound(playerSelection, computerSelection)); console.log('player choice is: ' + playerSelection.toUpperCase());

Answer 1

I guess that's just your first console.log:

console.log('computer choice is: ' + computerPlay().toUpperCase());

It plays a round for computer, then you play another one against prompted user.

Do that instead:

function computerPlay() {
    let answer = computerAanswer[Math.floor(Math.random() * computerAanswer.length)];
    console.log('computer choice is: ' + answer.toUpperCase()); 
    return answer;
}

Answer 2

When I nested

console.log('computer choice is: ' + answer.toUpperCase()); 

into computerPlay function it works.

const computerAanswer = ["rock", "paper", "scissors"];

function computerPlay() {
    let answer = computerAanswer[Math.floor(Math.random() * computerAanswer.length)];
    console.log('computer choice is: ' + answer.toUpperCase()); 
    return answer;
}



function playRound (playerSelection, computerSelection) {
    playerSelection  = playerSelection.toLowerCase()
    
    if (playerSelection == "rock" && computerSelection == "scissors") {
        return "Congrats,you are winner!";
    }   else if (playerSelection == "paper" && computerSelection == "rock") {
        return "Congrats,you are winner!";
    }   else if (playerSelection == "scissors" && computerSelection == "paper") {
        return "Congrats,you are winner!";
    }   else if (playerSelection == "rock" && computerSelection == "rock") {
        return "Draw!";
    }   else if (playerSelection == "paper" && computerSelection == "paper") {
        return "Draw!";
    }   else if (playerSelection == "scissors" && computerSelection == "scissors") {
        return "Draw!";
    }   else {
        return "You lose. Maybe next time...";
    }
}

let playerSelection = prompt("Make your choose: Rock, Paper or Scissors?");
let computerSelection = computerPlay();
console.log(playRound(playerSelection, computerSelection));

console.log('player choice is: ' + playerSelection.toUpperCase());