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

namespace _0922方法练习
{
class Program
{
static void Main(string[] args)
{
//计算两个数字的和,
//要求第一个数字必须比第二个数字小,否则重新输入
Console.WriteLine("请输入第一个数字");
string strNumberOne = Console.ReadLine();
int numberOne = GetNumber(strNumberOne);
Console.WriteLine("请输入第二个数字");
string strNumberTwo = Console.ReadLine();
int numberTwo = GetNumber(strNumberTwo);
JudgeNumber(ref numberOne, ref numberTwo);
int sum = GetSum(numberOne, numberTwo);
Console.WriteLine(sum);
Console.ReadKey();
}
public static int GetSum(int n1,int n2)
{
int sum = n1 + n2;
return sum;
}


public static void JudgeNumber(ref int n1, ref int n2)
{
while (true)
{
if (n1 < n2)
{
return;
}
else
{
Console.WriteLine("第一个数字不能大于第二个数字,重新输入第一个数字");
string s1 = Console.ReadLine();
n1 = GetNumber(s1);
Console.WriteLine("请输入第二个数");
string s2 = Console.ReadLine();
n2 = GetNumber(s2);
}


}
}
public static int GetNumber(string s)
{
while (true)
{
try
{
int number = Convert.ToInt32(s);
return number;
}
catch
{
Console.WriteLine("输入有误");
s = Console.ReadLine();
}
}
}
}
}