Question

所以，我是初学C＃程序员，我无法让我的程序运行。我希望能够使用Main（）方法的用户输入，将其传递给PaintJobCalc（）来计算绘制作业，并将计算结果发送回main方法。我一直在玩它一个小时，我无法到达任何地方。

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

class PaintingEstimate
{
    static void Main()
    {
        string[] input = {};

        Write("\n   Type a room length in feet >> ");
        input[0] = ReadLine();
        Write("\n   Type a room width in feet >> ");
        input[1] = ReadLine();

        PaintJobCalc((string[])input.Clone());

    }

    public static void PaintJobCalc(string[] args)
    {
        int inputOne = Convert.ToInt32(input[0]);
        int inputTwo = Convert.ToInt32(input[1]);

        var wallCount = (inputOne + inputTwo) * 2;
        var squareFootage = wallCount * 9;
        var endEstimate = squareFootage * 6;

        WriteLine("\n   Your Paint Job total will be ${0}", endEstimate);

        ReadLine();


    }
}

Answer 1

首先，您需要if(names.contains("some string")) { //do what you wanna do here }。

return endEstimate

注意 - 从public static int PaintJobCalc(string[] args) { int inputOne = Convert.ToInt32(args[0]); int inputTwo = Convert.ToInt32(args[1]); var wallCount = (inputOne + inputTwo) * 2; var squareFootage = wallCount * 9; var endEstimate = squareFootage * 6; return endEstimate; }到void的回复类型的交换。

与某些编程语言不同int数组不是动态的，你不能有一个空数组，然后在它们上面添加项目并期望它们增长。

C#

你应该声明这样的数组：

string[] input = {}; // this is size 0 and won't grow in size

现在，你的主要方法是这样的：

string[] input = new string[2];

Answer 2

您需要查看this有关如何从函数返回值的信息。

尝试低于code

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

class PaintingEstimate
{
    static void Main()
    {
        string[] input = new string[2];

        Write("\n   Type a room length in feet >> ");
        input[0] = ReadLine();
        Write("\n   Type a room width in feet >> ");
        input[1] = ReadLine();

        decimal endEstimate =PaintJobCalc((string[])input);

        WriteLine("\n   Your Paint Job total will be ${0}", endEstimate);

        ReadLine();

    }

    public static void PaintJobCalc(string[] input)
    {
        int inputOne = Convert.ToInt32(input[0]);
        int inputTwo = Convert.ToInt32(input[1]);

        var wallCount = (inputOne + inputTwo) * 2;
        var squareFootage = wallCount * 9;
        var endEstimate = squareFootage * 6;

        return endEstimate;


    }
}

Answer 3

由于方法的返回类型为void，因此无法返回任何内容。它不是C＃特定的，而是在所有编程语言中都是相同的。尝试将方法PaintJobCalc的返回类型更改为int / float（以适合您的要求为准）并在某个int / float变量上调用它。

那会有效。祝你好运

Answer 4

您不需要数组。您的方法可以采用两个整数参数并返回整数作为结果。方法签名非常重要，必须清楚地描述方法的输入。不要使用错误的签名使事情变得模棱两可。

public static int PaintJobCalc(int length, int width)
{
    var wallCount = (length + width) * 2;
    var squareFootage = wallCount * 9;
    var endEstimate = squareFootage * 6;

    return endEstimate;
}

static void Main()
{
    Write("\n   Type a room length in feet >> ");
    int length = Convert.ToInt32(ReadLine());

    Write("\n   Type a room width in feet >> ");
    int width = Convert.ToInt32(ReadLine());

    var value = PaintJobCalc(length, width);

    WriteLine("\n   Your Paint Job total will be ${0}", value);
}

在将值传递给新方法后，如何使用值？

4 个答案: