三角形面积=底×高 然后在代码写上这个公式 static void Main(string[] args) { Console.WriteLine(请输入三角形的底：); int a = Convert.ToInt32(Console.ReadLine()); Console.WriteLine(请输入三角形的高：); int b = Convert.ToInt32(Console.ReadLine()); Console.WriteLine(三角形的面积为： + a * b + \r\n); }
First, float number shouldn't be compared with this equal operater == , you should sub them, and then compare the result with 1e-7 or so. Second, you missed use OR and AND operater.
