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>