Given an array A of positive lengths, return the largest perimeter of a triangle with non-zero area, formed from 3 of these lengths. If it is impossible to form any triangle of non-zero area, return 0. Example 1: Input: [2,1,2] Output: 5 Example 2: I
编写一个控制台应用程序,输入三角形或者长方形边长,计算其周长和面积并输出. 代码如下: using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace Testing1_1 { class Program { static void Main(string[] args) { //三角形 长方形的变量 int