Question

我的任务是创建一对重载方法，这些方法接受一些值并将它们相乘。我决定使用数组来保持整洁，但我的方法似乎没有按预期运行。如何将数组值传递给重载方法？

import java.util.Scanner ;

class Lab8Ex4 {

    public static void main ( String[] args ) {
        //Declare Variables
        int[] numbers = new int[5] ;

        //Setup a scanner.
        Scanner scan = new Scanner ( System.in ) ;

        ///////////////////
        //Get User Input//
        ///////////////////

        for ( int j = 0 ; j < 5 ; j++ ) {
            System.out.println ( "Please enter a number: " ) ;
            numbers[j] = scan.nextInt() ;
        }

        //Call the first method
        multiply ( numbers[0], numbers[1] );
        //Call the second method
        multiply ( numbers[2], numbers[3], numbers[4] );
    }

    //Overloaded Method - Multiplication of two numbers.
    static int multiply ( int a, int b ) {
        int sum = a * b ;
        return sum ;
    }

    //Overloaded Method - Multiplication of three numbers.
    static int multiply ( int a, int b, int c ) {
        int sum = a * b * c ;
        return sum ;
    }
}

Answer 1

你能做的就是这个，

static int multiply(int... values) {
    int product = 1;

    for(int v : values) {
        product *= v;
    }

    return product;
}

并称之为

int a = 1;
int b = 2;
int c = 3;

System.out.println(multiply(a));
System.out.println(multiply(a, b));
System.out.println(multiply(a, b, c));

如何将数组值传递给重载方法？

1 个答案: