C#输入两个数，数字2必须大于数字1，计算从数字1到数字2的和

悠悠 2023-03-06 03:26 4阅读 0赞

using System;
    using System.Collections.Generic;
    using System.Text;
    
    namespace KnowledgePoint
    {
        class _35_Ex_Function
        {
            /// <summary>
            /// 方法练习
            /// </summary>
            /// <param name="args"></param>
            static void Main(string[] args)
            {
                Console.Write("请输入第 1 个数字：");
                string strNum01 = Console.ReadLine();
                int intNum01 = DataTypeConversion(strNum01);
                Console.Write("\n请输入第 2 个数字：");
                string strNum02 = Console.ReadLine();
                int intNum02 = DataTypeConversion(strNum02);
    
                TheSizeOfTheJudgment(ref intNum01, ref intNum02);
    
                int sum = SumOfTwoNumbers(intNum01, intNum02);
                Console.WriteLine("\n计算结果：数字 1 和数字 2 的和为：" + sum);
    
                Console.ReadKey();
            }
    
            /// <summary>
            /// 返回两个数的累加和
            /// </summary>
            /// <param name="num1">数字1</param>
            /// <param name="num2">数字2</param>
            /// <returns>和</returns>
            public static int SumOfTwoNumbers(int num1, int num2)
            {
                int sum = 0;
                for (int i = num1; i <= num2; i++)
                {
                    sum += i;
                }
                return sum;
            }
    
            /// <summary>
            /// 判断两个数字的大小关系
            /// </summary>
            /// <param name="num1">数字1</param>
            /// <param name="num2">数字2</param>
            public static void TheSizeOfTheJudgment(ref int num1, ref int num2)
            {
                while (true)
                {
                    if (num1 < num2)
                    {
                        return;
                    }
                    else
                    {
                        Console.WriteLine("\n提示：数字 2 必须大于数字 1 ！");
                        Console.Write("\n请重新输入第 1 个数字：");
                        string strNum1 = Console.ReadLine();
                        num1 = DataTypeConversion(strNum1);
                        Console.Write("\n请重新输入第 2 个数字：");
                        string strNum2 = Console.ReadLine();
                        num2 = DataTypeConversion(strNum2);
                    }
                }
            }
    
            /// <summary>
            /// 数字类型转换
            /// </summary>
            /// <param name="target">目标数字</param>
            /// <returns>转换结果</returns>
            public static int DataTypeConversion(string target)
            {
                while (true)
                {
                    try
                    {
                        int number = Convert.ToInt32(target);
                        return number;
                    }
                    catch
                    {
                        Console.WriteLine("\n提示：数字格式异常！");
                        Console.Write("\n请重新输入第 1 个数字：");
                        target = Console.ReadLine();
                    }
                }
            }
        }
    }