未处理的异常：System.FormatException：索引（从零开始）必须大于或等于零且小于参数列表的大小。 [英] Unhandled Exception: System.FormatException: Index (zero based) must be greater than or equal to zero and less than the size of the argument list.

问题描述

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

namespace ConsoleApplication1
{
    class LargestofThree
    {
       
        static void Main(string[] args)
        {
        
        
        int _firstNumber, _secondNumber, _thirdNumber;


        Console.WriteLine("Enter your 3 numbers to compare");


        _firstNumber = int.Parse(Console.ReadLine());
        _secondNumber = int.Parse(Console.ReadLine());
        _thirdNumber = int.Parse(Console.ReadLine());

        if (_firstNumber>_secondNumber && _firstNumber>_thirdNumber)
        {
            Console.WriteLine("The Greatest of 3 numbers is {0}",_firstNumber);
        }
        else if (_secondNumber>_firstNumber && _secondNumber>_thirdNumber)
        {
            Console.WriteLine("The Greatest of 3 numbers is {1}",_secondNumber);
        }
        else if (_thirdNumber>_firstNumber &&_thirdNumber>_secondNumber)
        {
           Console.WriteLine("The Greatest of 3 numbers is {2}",_thirdNumber);
        }



        }
    }
}

当我跑步时
程序我在最后的else-if语句中得到错误



未处理的异常：System.FormatException：索引（基于零）必须更大

大于或等于零且小于参数列表的大小。

when i run the program i get a error in the last else-if statment

"Unhandled Exception: System.FormatException: Index (zero based) must be greater
than or equal to zero and less than the size of the argument list."

推荐答案

当你在一个{#n}替换占位符中使用字符串，字符串后面必须有一些参数，它们对应于{}内的从零开始的索引号。



当你写：Console。 WriteLine（最大的3个数字是{1}，_ secondNumber）;



编译器在字符串后面查找第二个参数（index =＃1），并且有一个错误。



补救措施很简单：只需在写入控制台的所有语句中使用{0}。 br />


我注意到你在代码中引用了Linq库;你想知道如何使用Linq简化这个吗？提示：将三个数值放在List中，并使用IEnumerable的Max扩展方法。

When you use the {#n} substitution place-holder in a string, there must be a number of arguments, after the string, which correspond to the zero-based index number inside the {}.

When you write: Console.WriteLine("The Greatest of 3 numbers is {1}",_secondNumber);

The compiler looks for a second argument after the string (index = #1), and there is an error.

The remedy is simple: just use {0} in all your statements that write to the Console.

I notice you reference the Linq library in your code; do you want to know how to simplify this using Linq ? Hint: put your three numeric values in a List, and use the Max extension method of IEnumerable.

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