C#之100以内的基本运算出题系统

来源：互联网发布：宇宙模拟软件编辑：程序博客网时间：2024/05/29 03:46
using System;using System.Collections.Generic;using System.Linq;using System.Text;/*namespace Point{    class Program    {        static void Main()        {            float f = 1.2550f;            Console.WriteLine(Math.Round(f, 2));            string re;            re = f.ToString("#0.00");  //保留小数点后两位            Console.WriteLine(re);            re = f.ToString("f2");            Console.WriteLine(re);            int a = 9;            int b = 61;            float d = float.Parse(Console.ReadLine());            Console.WriteLine(float.Parse(((float)a/b).ToString("f2"))==d);      //类型之间的转换        }    }}*/namespace Question{    class Program    {        static void Main()        {            int Grade_Count=0;     //计分            Random R = new Random();            int a;     //用来决定加、减、乘、除中的一种运算            for (int i = 0; i < 10; i++)   //出10道题            {                int First_Num;        //第一个元素                int Second_Num;      //第二个元素                First_Num = R.Next(100);                label: Second_Num = R.Next(100);                int Res;     //结果                string s;                a = R.Next(4) + 1;                switch (a)                {                    case 1:         //加法运算                        Console.WriteLine(First_Num + "+" + Second_Num + "=");                        s = Console.ReadLine();                        Res = int.Parse(s);                        if (First_Num + Second_Num == Res)                        {                            Console.WriteLine("回答正确");                            Grade_Count++;                        }                        else                        {                            Console.WriteLine("回答错误");                            Console.WriteLine("正确答案为：" + (First_Num + Second_Num));                        }                        break;                    case 2:        //减法                        Console.WriteLine(First_Num +"-"+ Second_Num +"=");                        s = Console.ReadLine();                        Res = int.Parse(s);                        if (First_Num - Second_Num == Res)                        {                            Console.WriteLine("回答正确");                            Grade_Count++;                        }                        else                        {                            Console.WriteLine("回答错误");                            Console.WriteLine("正确答案为：" + (First_Num - Second_Num));                        }                        break;                    case 3:           //乘法                        Console.WriteLine(First_Num + "*" + Second_Num + "=");                        s = Console.ReadLine();                        Res = int.Parse(s);                        if (First_Num * Second_Num == Res)                        {                            Console.WriteLine("回答正确");                            Grade_Count++;                        }                        else                        {                            Console.WriteLine("回答错误");                            Console.WriteLine("正确答案为：" + (First_Num * Second_Num));                        }                        break;                    case 4:          //除法                        Console.WriteLine(First_Num +"/" +Second_Num +"=");                        s = Console.ReadLine();                       // Res = int.Parse(s);                        float f = float.Parse(s);                        if (Second_Num == 0)                        {                            goto label;                        }                        else                        {                            if (float.Parse(((float)First_Num / Second_Num).ToString("f2")) == f)                            {                                Console.WriteLine("回答正确");                                Grade_Count++;                            }                            else                            {                                Console.WriteLine("回答错误");                                Console.WriteLine("正确答案为：" + float.Parse(((float)First_Num / Second_Num).ToString("f2")));                            }                        }                        break;                }            }            Console.WriteLine("你的总得分为："+ Grade_Count);        }    }}
0 0