如何将数组中的所有元素相乘? [英] How to multiply all elements from array?

问题描述

我开始学习C#，并且正在编写一个程序，该程序将首先要求用户输入数字列表.当用户完成输入输入后，我想对用户在输入中提供的每个数字取平方.用户输入的示例是 2 3 5 .

I am beginning to learn C# and am writing a program that will first ask a user to enter a list of numbers. When the user finishes entering the input, I would like to square every number the user provided in the input. An example of user input is 2 3 5.

这是代码:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Program
{
    class Third
    {
        public static void Main()
        {
            Console.WriteLine("Enter how much numbers");

            int howMuch = int.Parse(Console.ReadLine());
            int[] num = new int[howMuch];
            int sum = 0;

            for (int i = 0; i < num.Length; i++ )
            {
                sum = num[i] * num[i]; // this is what i did but it does not work?
            }

            Console.WriteLine(sum);
            Console.ReadLine();
        }
    }
}

具体地说，我首先希望在 numbers 数组中捕获用户输入.然后，我想对创建的 num 数组中的每个数字求平方.我的程序怎么了?

Specifically, I would first like the user input to be captured in the numbers array. And then I would like to square each number in the num array that was created. What's wrong with my program?

推荐答案

这可能会更好一些，尽管还有很多工作要做！

This might be a LITTLE better, although there is still quite a bit of tidying up to do!

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Program
{
class Third
{

    public static void Main()
    {

        Console.WriteLine("Enter how many numbers");

        int howMuch = int.Parse(Console.ReadLine());

        int[] num = new int[howMuch];

        int sum = 1;
        for(int i=0;i<num.Length;i++) //allows you to fill the array
        {
           Console.WriteLine("Please enter an integer");
            sum *= int.Parse(Console.ReadLine()); // this will now multiply the value to sum, as your comment suggests
        }

        Console.WriteLine(sum);

        Console.ReadLine();

    }

}
}

编辑

sum *= num[i];

应该做你想做的事！

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