For help, 5 x4x3x2x1 + 4 + 3 x2x1 x3x2x1 + 2 x1 + 1 x1=how this equation written in c #, I not ask out the results of this type, I want to the output of this equation, the teachers teach, please. I am a novice, just learning, thank you

CodePudding user response:

Demand is not clear
If the calculation result is
Recursion is suitable

CodePudding user response:

N (n - 1) (n - 2)... 1 + (n - 1) (n - 2)... 1 + (n - 2) (n - 3)... 1 +... + 1=what I want is this equation, how to use c # complete the output, the great god answer ah, thank you thank you

CodePudding user response:

Made up of, a little complicated, so a mean

 
using System.Data; 
using System.Windows.Forms; 

The namespace Test_8 
{
Public partial class Form1: Form 
{
Public _click () 
{
InitializeComponent(); 
MessageBox. Show (" formula: "+ expression (5, 1) +" \ r "+" result: "+ new DataTable (.) Compute (expression (5, 1), null)); 
} 

Private string expression (int _max, int _min) 
{
String exp=null; 
The int value=https://bbs.csdn.net/topics/_max; 
While (value & gt;=_min) 
{
String ls=null; 
For (int I=value; I & gt;=_min; I -) {ls +=I; If (I & gt; _min) ls +="*"; } 
Exp +=ls; 
If (value & gt; _min) exp +="+"; 
The else {exp +="*" + value; } 
The value -; 
} 
Return exp. 
} 
} 
} 

CodePudding user response:

5 x4x3x2x1 + 4 + 3 x2x1 x3x2x1 + 2 x1 + 1 x1=
Why is 1 x1, feeling is 1 more reasonable

 using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Text; 

The namespace T396195500 
{
Class Program 
{
The static void Main (string [] args) 
{
List List=new List (a); 
For (int I=5; I & gt;=1; I -) 
{
Var l=new List (a); 
For (int j=I; J & gt;=1; J -) 
L.A. dd (j.t. oString ()); 
List. The Add (l); 
} 
Console. WriteLine (string. Join (" + ", the list. Select (x=& gt; String. The Join (" x ", x))) + "="); 
} 
} 
}