将负面转为正面 [英] convert negative to positive

问题描述

你好。



我有一个问题，我希望你可以帮我。



我将从这个数组获得所有负数int [] num = {-5，-4，-3，-2，-1,1,2,3,4,5,6};

然后将negitive更改为positive，然后在屏幕上输入已更改为positive的negetive。

Hello.

I have a problem that i hope you can help me with.

I going to get all the negative from this array int[] num = {-5,-4,-3,-2,-1,1,2,3,4,5,6};
and then change the negitive in to positive and then type it out on the screen the negetive that have changed to positive.

推荐答案

要从数组中获取所有负整数，请尝试以下方法：

Hi,

To get all negative integers from the array, try this:

int[] neg = num.Where(x => x < 0).ToArray();

更改中的负数转为正数，试试这个：

To change the negative numbers in neg into positive numbers, try this:

int[] negToPos = neg.Select(x => Math.Abs(x)).ToArray();

如果你只是想改变所有负数在 num 中转为正数，试试这个：

And if you just want to change all negative numbers in num into positive numbers, try this:

int[] pos = num.Select(x => Math.Abs(x)).ToArray();

希望这有帮助。

Hope this helps.

当你得到一个负值时，反转这样的符号：

When you get a negative value, reverse the sign like this:

result = -ValueFromArray;

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

namespace Cs_Scratch_Console
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] numbers = new int[] {-1,-2,0,1,2};
            for (int val = 0; val <= numbers.Length - 1; val++)
            {
                if (numbers[val] < 0)
                {
                    Console.WriteLine(numbers[val]);
                    numbers[val] = Math.Abs(numbers[val]);
                }
            }
        }
    }
}

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