static void Main(string[] args) { Console.WriteLine("需要生成的题目总数:"); int Howmany = 0; int num = int.Parse(Console.ReadLine()); for (int i = 0; i < num; i++) { Calculator calculator = new Calculator(); //调用Calculator类及函数 int fhlen = calculator.Genelment(); string _ = calculator.Gensign(fhlen); int result = calculator.Genresult(); string timu = calculator.Gettimu(); int isok = calculator.Getisok(); if ((isok != 1) | (result < 0)) { num++; } else { Howmany += 1; Console.WriteLine("四则运算题:"); Console.WriteLine(Howmany); Console.WriteLine(timu); FileStream file = new FileStream("C:/Users/a/Desktop/AchaoCalculator/text.txt", FileMode.Append, FileAccess.Write); StreamWriter stream = new StreamWriter(file); stream.WriteLine(timu + "=" + result); stream.Close(); file.Close(); } } }