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im trying to make a song in beeps with pi and i need to delet the dot (pi1[1]) () and i need to convert the char array pi1 to int array pi2 (*)
double a = Math.PI;
string b=a.ToString();
char[] pi1 = b.ToCharArray();
* pi1[1] = '0';
int[] pi2;
for (int i = 0; i < pi1.Length; i++)
{
** pi2[i] = int.Parse(pi1[i].ToString());
}
//for (int i = 0; i > 40; i++)
//{
// Console.Beep(100*c, 100);
//}
The part that seems to be causing the problem is the need to not try to convert the decimal point. You can do this using string.Replace.
The following is a one-line solution to get the first 15 digits of pi as an array of integers:
int[] piDigits = Math.PI.ToString()
.Replace(".", "")
.Select(c => c - '0')
.ToArray();
Assuming that pi1 consists entirely of the characters 0–9, you could parse it into an int array using:
int[] pi2 = pi1.Select(c => c - '0').ToArray();
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i try to make the largest number, of entered number. Have some ideas, but all of them end by error.
int n = 123 // in the end shell be 321, 567 -> 765, 184 -> 841
StringBuilder str = new StringBuilder(n.ToString());
int[] aray = new int[3];
for (int i = 0;i < str.Length;i++) {
aray[i] = int.Parse(str[i].ToString());
}
aray.OrderBy(x => x);
var a = aray.Join(' '); //eror
Console.WriteLine(a);
Well, we have two cases: postive and negative numbers:
n = 43125 -> 54321
n = -43125 -> -12345
We can hold both cases with a help of Linq:
using System.Linq:
...
string result = string.Concat(n < 0
? n.ToString().OrderBy(c => c)
: n.ToString().OrderByDescending(c => c));
Here we exploit the fact that '-' < '0' and we don't have to do any special work for - in case of negative numbers. If you want to obtain int value, just add int.Parse:
int result = int.Parse(string.Concat(n < 0
? n.ToString().OrderBy(c => c)
: n.ToString().OrderByDescending(c => c)));
but be careful: large n will cause integer overflow:
n = 1234567890 -> 9876543210 > int.MaxValue
You have a lot of code to accomplish something very simple:
var ans = int.Parse(String.Concat(n.ToString().OrderByDescending(dc => dc)));
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this is my first post so excuse me if I am not being clear enough.
As the title says I want to split a number into smaller parts, for example 1998 to 1,9,9,8. I have looked around but I am stuck trying to figure out the right term to search for.
Reason why I want this done is to later multiply every other number with either 1 or 2 to be able to examine whether it's correct or not.
Sorry I can't provide any code because I am not sure how I should tackle this problem.
As #mjwills said, mod is what you want.
static IEnumerable<int> Digitize(int num)
{
while (num > 0)
{
int digit = num % 10;
yield return digit;
num = num / 10;
}
}
And then call it like so:
static void Main(string[] _)
{
int num = 1998;
int[] digits = Digitize(num).ToArray();
Console.WriteLine($"Original: {num}");
foreach (var digit in digits)
Console.WriteLine(digit);
}
make a string of that number and make it like this
```
int a = 1990;
int[] intArray = new int[a.ToString().Length];
int index = 0;
foreach( char ch in a.ToString())
{
intArray[index] = int.Parse(ch.ToString());
index++;
}
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I want to make some sort of mastermind game in the console where the computer generates a 3 digit code and you have to guess it. The computers also tells you which digit you get right after you take a guess. How would i best do this? I don't know a way to "chop up" input so that i can make the computer check it against the digit it has.
example:
computer generates random code: 123
you guess: 321
computer : -*- (the star indicates which digit you got right)
I have an idea about how i'd indicate what digits are right or not, but i don't know how to separate the input into parts
Convert the computer generated random number into a string. The user input is given as string anyway.
The string type has an indexer allowing you to access single characters
string s = "abc";
char a = s[0];
char b = s[1];
char c = s[2];
for (int i = 0; i < s.Length; i++) {
Console.WriteLine($"s[{i}] = '{s[i]}'");
}
You write char literals as
char ch = 'x';
using single quotes.
Example:
string userInput = Console.ReadLine();
int code = SomehowGenerateRandomCode();
string codeString = code.ToString();
// Let's assume that both numbers have 3 digits.
for (int i = 0; i < 3; i++) {
if(userInput[i] == codeString[i]) {
// digits are equal
} else {
// digits are different
}
}
To split an int to its digits you can convert to string an split like:
int i = 123;
string myInt = i.ToString();
List<int> digits =new List<int>();
foreach (char c in myInt)
{
digits.Add(int.Parse(c.ToString());
}
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I am in the process of converting a VB application. I am trying to create a string using StringBuilder as I cannot change a string using the Mid function. I have a loop although it only adds the first character to the string the rest is just white space. How can i add all the data to the string?
The code snippet is below; thanks for your help
int table = 0;
string tableData = Strings.StrDup(253, " ");
int i = 0;
string listData = null;
int pointer =0;
StringBuilder sb = new StringBuilder(tableData);
sb.Insert(0, Strings.StrDup(253, Strings.Chr(32)));
sb.Insert(0, typeOfTable + Strings.Chr(0));
pointer = 2;
for (i = 0; i <= lstTABLE.Items.Count -1; i++)
{
listData = lstTABLE.Items[i].ToString();
table = Convert.ToInt32(-(Conversion.Val(listData) * 10));
sb.Insert(pointer, Functions.FNCodeTwoChar(table));
pointer +=2;
}
sb.Insert (202,Functions.EncodeKP(Convert.ToSingle(Conversion.Val(lblStartTable.Text))));
sb.Insert(205,Functions.EncodeKP(Convert.ToSingle(Conversion.Val(lblEndTable.Text))));
sb.Insert(208, Strings.Space(36));
sb.Insert(244, " 0");
sb.Insert(248, " 0");
The answer to the question of "I have a loop although it only adds the first character to the string the rest is just white space. How can i add all the data to the string?" is:
The second character you add to the string is Strings.Chr(0) which is the string terminator character. When C# (or VB.Net for that matter) hit this character it stops reading the string.
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I want an auto-numbering class in c# which would generate numbers of 8 digit length in the following format i.e. 1A2B3C4D..one number followed by one letter.Any suggestions??
Pseudocode for generating such string:
String result = "";
for ( int i = 0; i < 8 ; i++)
{
if ( i % 2 == 0)
{
// random(a,b) returns random value between or equal to a-b
result.append(random(0,9).toString());
}
else
{
result.append(random(65,90).toChar()); // Generating a random value between 65-90 (A-Z in ascii)
}
}
Edit:
Or as Sayse suggested:
String result = "";
for (int i = 0; i< 4; i++)
{
result.append(random(0,9).toString());
result.append(random(65-90).toChar());
}