Question

嘿，我刚刚创建了一个小型控制台应用程序，用于写出需要申请的工作，位置和联系方式就像一个小练习。看看我的代码，似乎不断写出Console.WriteLine语句是非常低效的，因为我已经使函数有助于提高效率。

我认为实现这一目标的最佳方法是使用循环，但我不确定如何使用不同的变量（例如phn1，phn2变量）使循环循环

谢谢你们！

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

namespace PlacestoApplyfor
{
    class Program
    {
        static void Main(string[] args)
        {
            //Displays the actual program in descending order.
            //Used functions as a faster method to change variable names on the fly
            //Whilst keeping its format clean and in descending order 
            Console.WriteLine("--Name of Places--");
            ApplyFor("EdwayApps" ,"Appxperts","Genie App Studio","Appster");
            Console.WriteLine("--Name of Locations--");
            LocationsInOrder("3/424 St kilda", "101/27 Little Collins St", "Contact Online only", "2/377 LonsDale ST");
            Console.WriteLine("--Companies Numbers-- ");
            PhoneNumbers(043990976,1300939225,0421336722,1800709291);
        }

        static void ApplyFor(string num1, string num2, string num3, string num4) {
        //Literally just the job names 
        Console.WriteLine(num1);
        Console.WriteLine(num2);
        Console.WriteLine(num3);
        Console.WriteLine(num4);
        }

        // Job Locations

        static void LocationsInOrder(string loc1, string loc2, string loc3, string loc4) {
        Console.WriteLine(loc1);
        Console.WriteLine(loc2);
        Console.WriteLine(loc3);
        Console.WriteLine(loc4);
        }

        //Contact - references

        static void PhoneNumbers(int phn1, int phn2, int phn3, int phn4) {
        Console.WriteLine(phn1);
        Console.WriteLine(phn2);
        Console.WriteLine(phn3);
        Console.WriteLine(phn4);

        }
    }
}

Answer 1

params关键字是您的朋友：

static void PhoneNumbers(params int[] phn) 
{
    foreach(var num in phn)
        Console.WriteLine(num);
}

然后你可以这样做：

PhoneNumbers(1,2,3,4,5,6,7,8,9);

甚至传入一个数组：

PhoneNumbers(new int[] {1,2,3,4,5,6,7,8,9});

Answer 2

为什么你写这么多console.writeline（）而不是写下面的代码

在课堂上

static void Main(string[] args)
    {
        Console.WriteLine("--Name of Places--");
        ApplyFor("EdwayApps", "Appxperts", "Genie App Studio", "Appster");
        Console.WriteLine("--Name of Locations--");
        LocationsInOrder("3/424 St kilda", "101/27 Little Collins St", "Contact Online only", "2/377 LonsDale ST");
        Console.WriteLine("--Companies Numbers-- ");
        PhoneNumbers(043990976, 1300939225, 0421336722, 1800709291);
        Console.ReadLine();
    }
    static void ApplyFor(string num1, string num2, string num3, string num4)
    {
        //Literally just the job names 
        Console.WriteLine(num1 + "\n"+num2 + "\n" + num3 + "\n " + num4);
    }
    // Job Locations
    static void LocationsInOrder(string loc1, string loc2, string loc3, string loc4)
    {
        Console.WriteLine(loc1 + "\n" + loc2 + "\n" + loc3 + "\n " + loc4);
    }
    //Contact - references
    static void PhoneNumbers(int phn1, int phn2, int phn3, int phn4)
    {
        Console.WriteLine(phn1 + "\n" + phn2 + "\n" + phn3 + "\n " + phn4 +"\n");
    }

Answer 3

你可以只使用一个函数来编写所有行，并为换行符配置分隔符＆＃34; \ n＆＃34;或＆＃34;，＆＃34;对于带有逗号分隔值的一行。你甚至可以添加＆＃34;主题＆＃34;作为打印功能的第一个参数，它将在＆＃34; - 主题 - ＆＃34;符号。

static void Main(string[] args)
{
    //Displays the actual program in descending order.
    //Used functions as a faster method to change variable names on the fly
    //Whilst keeping its format clean and in descending order 
    Print("Name of Places", "EdwayApps", "Appxperts", "Genie App Studio", "Appster");
    Print("Name of Locations", "3/424 St kilda", "101/27 Little Collins St", "Contact Online only", "2/377 LonsDale ST");
    Print("Companies Numbers", 043990976, 1300939225, 0421336722, 1800709291);

    Console.ReadKey();
}

static void Print(string topic, params object[] array)
{
    Console.WriteLine("-- {0} -- \n\n  {1}\n", topic, string.Join("\n  ", array));
}

Answer 4

使用params很酷，就像Lloyd所说的那样，但如果你试图优化Console.WriteLine（），就不要为此反复调用.WriteLine。请查看String.Format和String.Join方法

static void PhoneNumbers(params int[] phn) 
{
    Console.WriteLine(String.Join(Environment.NewLine, phn));
}

同样的事情只是空格分隔的值，在一行

static void PhoneNumbers(params int[] phn) 
{
    Console.WriteLine(String.Join(" ", phn));
}

或者如果你想用一定数量的值在一行中写下所有这些值，只需执行此操作

static void PhoneNumbers(params int[] phn) 
{
    Console.WriteLine(String.Format("{0} {1} {2} {3}", phn));
}

需要帮助使Console.Writeline阻止循环更有效

4 个答案: