运用C#语言
1.求π/2的近似值的公式:
π/2=2/12/34/3*…2n/2n-12n/2n+1,求当n=1000时π的近似值
数组
using System; namespace ConsoleApp2 { class Program { static void Main(string[] args) { int n; double pi=1; for (n = 1; n <= 1000; n++) { pi=pi*2*n/(2*n-1)*2*n/(2*n+1); } Console.WriteLine("输出近似值: " +2*pi); } } }
2.设计一个程序,输入一个十进制数,输出相应的十六进制数
ui
using System; namespace jinzhizhuanhuan { class Program { private static string result; static void Main(string[] args) { Console.WriteLine("请输入十进制数: "); int m = int.Parse(Console.ReadLine()); String result= Convert.ToString(m, 16); Console.WriteLine("十六进制数为: " ); Console.WriteLine(m.ToString("X")); } } }
3.找出数组a中最大值的下标,输出下标及最大值
spa
using System; namespace zuidazhix { class Program { static void Main(string[] args) { int max; int i; int j; int[] her = new int[] { 89, 23, 45, 34, 34, 56, 6, 5, 9, 21 }; max = her[0]; for (i = 1; i < her.Length; i++) { if (her[i] > max) { max = her[i]; } } Console.WriteLine("最大值是: " + max); for (j = 0; j < her.Length; j++) { if (her[j] == max) { Console.WriteLine("下标是: "+j); } } } } }