[Lab] Javascript 大小事試試 --- 使用亂數

語法 Math.random()

實作：利用亂數決定電腦出 剪刀  石頭  布 的遊戲

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

compare(userChoice,computerChoice);