顾小排的第二次作业

第二次作业：熟悉使用工具

介绍	答案
GIT地址	https://github.com/gy722
GIT用户名	gy722
学号后五位	24212
博客地址	https://home.cnblogs.com/u/gy722/
作业链接	https://edu.cnblogs.com/campus/xnsy/GeographicInformationScience/homework/7582

1、配置环境

安装配置 Visual Studio。上学期的C#课安装的VS2010，因为下载安装的错误，我直接重新下载了2019版。

2、设计思路

程序的代码如下：

        using System;
        using System.Collections.Generic;
        using System.Linq;
        using System.IO;
        using System.Text;
        using System.Threading.Tasks;
        using System.Data;

生成四则运算式

namespace  顾毓的第二次作业
    {
        public class Program
        {
            //生成四则运算式
            public static char[] op = { '+', '-', '*', '/' };
            public static string Exam()
            {
                Random num = new Random();
                int num1, num2, operators, opnum, i;
                num1 = num.Next(0, 101);
                operators = num.Next(2, 4);
                string equation = null;
                equation += num1;
                for (i = 0; i < operators; i++)
                {
                    num2 = num.Next(0, 101);
                    opnum = num.Next(0, 4);
                    equation = equation + op[opnum] + num2;
                }
                return equation;
            }

生成答案

        //生成答案
        public static string operation(string equation)
        {

            object o = new DataTable().Compute(equation, "");
            while (o.ToString().Contains("."))
            {
                equation = Exam();
                o = new DataTable().Compute(equation, "");
            }
            string result = equation + "=" + o.ToString();
            return result;
        }
        public static void Main(string[] args)
        {

            int n;
            string result = null;
            Console.WriteLine("请输入题目数量：");
            n = Convert.ToInt32(Console.ReadLine());
            for (int i = 0; i < n; i++)
            {
                result = result + operation(Exam()) + "\n";
            }
            Console.WriteLine(result);
            FileStream fs = new FileStream(@"D:\subject.txt", FileMode.Create);
            StreamWriter sw = new StreamWriter(fs);
            sw.Write("operation");
            sw.Close();
            fs.Close();

        }

    }
}

图为运行结果