ilya_shyian
/
homework


			
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							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
//A
    function a(text){
        return alert(text)
    }
    function aSample(){
        a("Привет!") // вызывает alert("Привет!")
    }


//CUBE
    function cube(num){

        return num*num*num
    }

    function cubeSample(){
        console.log("input: 5; output: "+cube(5)) // => 125
    }

//AVG2

    function avg2(a,b){

        return (a + b) / 2
    }

    function avg2Sample(){
        console.log("input: 1,2; output: "+avg2(1,2)) // возвращает 1.5
        console.log("input: 10,5; output: "+avg2(10,5)) // возвращает 7.5
    }

//SUM3

    function sum3(num1 =0,num2=0,num3=0){

        return num1+num2+num3
    }

    function sum3Sample(){
        console.log("input: 1,2,3; output: "+sum3(1,2,3)) // => 6
        console.log("input: 5,10,100500; output: "+sum3(5,10,100500)) // => 100515
        console.log("input: 5,10; output: "+sum3(5,10)) // => 15

    }


//INTRANDOM
        function intRandom(a,b){

            if(!b){
                b=a
                a=0
            }
            return(Math.round(Math.random()*(b-a)+a))
        }

        function intRandomSample(){
            console.log("input: 2,15; output: "+ intRandom(2,15)) // возвращает целое случайное число от 2 до 15 (включительно)
            console.log("input: -1,-1; output: "+intRandom(-1,-1)) // вернет -1
            console.log("input: 0,1; output: "+intRandom(0,1)) // вернет 0 или 1
            console.log("input: 10; output: "+intRandom(10)) // вернет 0 до 10 включительно
        }

//GREETALL


    function greetAll(...params){

        let str = "Hello"
        for(let el of params){
            str += params.indexOf(el) ===0 ? ` ${el}` : `, ${el}`
        }
        alert(str)
    }

    function greetAllSample(){
        console.log("input: Superman; output: "+greetAll("Superman"))
        console.log("input: Superman, SpiderMan; output: "+greetAll("Superman", "SpiderMan"))
        console.log("input: Superman, SpiderMan, Captain Obvious; output: "+greetAll("Superman", "SpiderMan", "Captain Obvious"))
    }

//SUM

    function sum(...params){

        let sum = 0
        for(let num of params){
            sum+= +num
        }
        return sum
    }
    function sumSample(){
        console.log("input: 1; output: "+sum(1))
        console.log("input: 2; output: "+sum(2))
        console.log("input: 10,20,40,100; output: "+sum(10,20,40,100))
    }


//UNION
    for(;;){
        let task = prompt("Введите название задания")?.toUpperCase()
        if(!task){
            break;
        }
        switch (task){
            case "A": aSample()
                    break
            case "CUBE": cubeSample()
                    break
            case "AVG2": avg2Sample()
                    break
            case "SUM3": sum3Sample()
                    break
            case "INTRANDOM": intRandomSample()
                    break
            case "GREETALL": greetAllSample()
                    break
            case "SUM": sumSample()
                    break
        }
    }


//UNION DECLARATIVE
    //     let tasks = {
    //          "A": aSample,
    //          "CUBE": cubeSample,
    //          "AVG2": avg2Sample,
    //          "SUM3": sum3Sample,
    //          "INTRANDOM": intRandomSample,
    //          "GREETALL": greetAllSample,
    //          "SUM": sumSample
    //     }

    // for(;;){
    //     let task = prompt("Введите название задания")?.toUpperCase()
    //     if(!task){
    //         break;
    //     }
    //     tasks[task]()

    // }

    </script>
</body>
</html>