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Text bombardment

this is the program I'm trying to write:
Write a program that reads a text and line width from the console. The program should distribute the text so that it fits in a table with a specific line width. Each cell should contain only 1 character. It should then read a line with numbers, holding the columns that should be bombarded.
My code looks like this:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace _04.Text_Bombardment
{
class Program
{
static void Main(string[] args)
{
var sentence = Console.ReadLine();
var bombing = int.Parse(Console.ReadLine());
var selected = Console.ReadLine().Split(' ').Select(int.Parse).ToArray();
Dictionary<int, bool> bombDict = new Dictionary<int, bool>();
var newSentence = sentence + new string(' ', bombing - sentence.Length % bombing); // whole row minus words left
for (int i = 0; i < selected.Length; i++)
{
bombDict.Add(selected[i], true);
}
var rows = newSentence.Length / bombing;
var cols = bombing;
var count = 0;
var arrSent = newSentence.ToCharArray();
for (int i = 0; i < rows; i++)
{
for (int j = 0; j < cols; j++)
{
if (bombDict.ContainsKey(j) && bombDict[j] == true && arrSent[count] != ' ')
{
arrSent[count] = ' ';
try
{
if (arrSent[count + bombing] == ' ')
{
bombDict[j] = false;
}
else
{
bombDict[j] = true;
}
}
catch (IndexOutOfRangeException)
{
continue;
}
}
count++;
}
}
var finalSent = string.Join("", arrSent).TrimEnd();
Console.WriteLine(finalSent);
}
}
}
And it breaks on this sentence:
Vazov received his elementary education in hisnative town of Sopoandat Plovdiv. The son of a conservative, well-to-do merchant.
20
1 6 17 2 5 0 15
Current Output:
ov eceived i e en ry educa i n hi ative to n of opo dat Plov iv. T e s of a co serva ive well-to- o mer ha t.
Intended Output:
ov eceived i e en ry educa i n hi ative to n of opo dat Plov iv. T e s of a co serva ive well-to- o mer han .
Soo it only doesn't work on the end.
Can someone help me?
Any suggestions?
Additional notes:
For example, we read the text "Well this problem is gonna be a ride." and line width 10. We distribute the text among 4 rows with 10 columns. We read the numbers "1 3 7 9" and drop bombs on those columns in the table.
The bombs destroy the character they fall on + all the neighbouring characters below it.
Note: Empty spaces below destroyed characters stop the bombs (see column 7).
Finally, we print the bombarded text on the console: "W l th s p o lem i o na be a r de."
Note: The empty cells in the table after the text should NOT be printed.

Your solution is very difficult to understand, keep it simple give names to the variables that you can understand easily.
I modified your code, hope it helps you:
static void Main()
{
string sentence = "Well this problem is gonna be a ride.";
int numberOfColumns = int.Parse("10");
List<int> bombs = "1 3 7 9".Split(' ').Select(int.Parse).ToList();
// we need to convert to decimal, otherwise C# will ignore decimal part.
//example: 127/20 = 6.35, so we need 7 rows. if we don't convert to decimal we have 6
// the Ceiling says, always round up. so even 6.1 will be rounded to 7
int numberOfRows = (int)Math.Ceiling(sentence.Length / Convert.ToDecimal(numberOfColumns));
char[,] array = new char[numberOfRows, numberOfColumns];
int sentencePointer = 0;
for (int rowIndex = 0; rowIndex < numberOfRows; rowIndex++)
{
for (int colIndex = 0; colIndex < numberOfColumns; colIndex++)
{
// if you want to print the grid with the full text, just comment the 3 lines below,
//and keep only "array[rowIndex, colIndex] = sentence[sentencePointer];"
if (bombs.Contains(colIndex))
{
if (sentence[sentencePointer] == ' ') // bomb is deactivated
{
bombs.Remove(colIndex);
array[rowIndex, colIndex] = sentence[sentencePointer];
}
else
array[rowIndex, colIndex] = '*'; // * represents a bomb
}
else
array[rowIndex, colIndex] = sentence[sentencePointer];
sentencePointer++; // move next character
if (sentencePointer >= sentence.Length)
break; // we reach the end of the sentence.
}
}
PrintGrid(array, numberOfRows, numberOfColumns);
// just give some space to print the final sentence
Console.WriteLine("");
Console.WriteLine("");
Console.WriteLine("");
for (int rowIndex = 0; rowIndex < numberOfRows; rowIndex++)
{
for (int colIndex = 0; colIndex < numberOfColumns; colIndex++)
{
Console.Write(array[rowIndex, colIndex]);
}
}
Console.ReadKey();
}
private static void PrintGrid(char[,] array, int numberOfRows, int numberOfColumns)
{
Console.WriteLine(new string('-', numberOfColumns * 2));
for (int rowIndex = 0; rowIndex < numberOfRows; rowIndex++)
{
Console.Write("|");
for (int colIndex = 0; colIndex < numberOfColumns; colIndex++)
{
Console.Write(array[rowIndex, colIndex]);
Console.Write("|");
}
Console.WriteLine("");
}
}

Somewhat more elegant solution.
private static IEnumerable<char> Bomb(IEnumerable<char> text, IEnumerable<int> indexes, int length)
{
var indexArray = new List<int>(indexes);
var used = new object[length];
return text.Select(
(c, index) =>
{
if (c != ' ' && indexArray.Contains(index % length))
{
used[index % length] = new object();
return '\0';
}
if (c == ' ' && used[index % length] != null)
{
indexArray.Remove(index % length);
}
return c;
});
}

how to read matrix row elements in single line in C# console

I want to read a 5 X 5 matrix from input in console and I want to read row elements in a single line and not in separate lines, like this:
25 16 14 12
10 15 11 10
2 10 9 8 8
7 6 11 20
5 4 1 0 3

Multi line version:
private static int[,] ReadMatrix()
{
var mtr = new int[5, 5];
for (var i = 0; i < 5; i++)
{
var line = Console.ReadLine();
var spl = line.Split(' ');
if (spl.Length != 5) throw new FormatException();
for (var j = 0; j < 5; j++)
mtr[i, j] = int.Parse(spl[j]);
}
return mtr;
}
Single line version:
private static int[,] ReadMatrix()
{
var mtr = new int[5, 5];
var line = Console.ReadLine();
if (string.IsNullOrWhiteSpace(line)) throw new FormatException();
var spl = line.Split(' ');
if (spl.Length != 25) throw new FormatException();
for (var i = 0; i < 25; i++)
mtr[i/5, i%5] = int.Parse(spl[i]);
return mtr;
}

I think this could help: reading two integers in one line using C#
Basicly the string[] tokens = Console.ReadLine().Split(); and then you could call tokens.Length to see how many columns there r going to be.

i used this function to read elements
static int readIndex()
{
string num = string.Empty;
ConsoleKeyInfo cr;
do
{
cr = Console.ReadKey(true);
int n;
if (int.TryParse(cr.KeyChar.ToString(), out n))
{
num += cr.KeyChar.ToString();
Console.Write(cr.KeyChar.ToString());
}
else if (cr.Key == ConsoleKey.Backspace)
{
if (num.Length > 0)
{
Console.Write("\b");
num = num.Remove(num.Length - 1);
}
}
} while (cr.Key != ConsoleKey.Enter);
Console.Write(" ");
return int.Parse(num);
}
then we need just a loop to read elements like this
for (int i = 0; i < 5; i++)
{
for (int j = 0; j < 5; j++)
{
mat[i, j] = (int)readIndex();
}
Console.WriteLine();
}

Saving Text to array

I have been using this link as an example, but have been having troubles with it:
2d Array from text file c#
I have a textfile that contains :
1 1 0 0
1 1 1 0
0 0 0 1
0 1 0 0
And I'm trying to use the function:
static void Training_Pattern_Coords()
{
String input = File.ReadAllText(#"C:\Left.txt");
int i = 0, j = 0;
int[,] result = new int[4, 4];
foreach (var row in input.Split('\n'))
{
j = 0;
foreach (var col in row.Trim().Split(' '))
{
result[i, j] = int.Parse(col.Trim());
j++;
}
i++;
}
Console.WriteLine(result[1, 3]);
Console.ReadLine();
}
However I keep getting the error message (Input String was not in correct format) at the line :
foreach (var row in input.Split('\n'))
I think it has something to do with the spaces within the textfile but I'm not entirely sure. Thanks for your help!

Instead of File.ReadAllText use File.ReadLines.By doing that you won't need to use Split('\n').
int[,] result = new int[4, 4];
var lines = File.ReadLines(#"C:\Left.txt")
.Select(x => x.Split()).ToList();
for (int i = 0; i < 4; i++)
{
for (int j = 0; j < 4; j++)
{
result[i, j] = int.Parse(lines[i][j]);
}
}

Try ReadAllLines as opposed to ReadAllText

Replace any \r (carriage return)
input = input.Replace('\r',' ');

Replace your \r to "\r\n"
Try this:
foreach (var row in input.Split("\r\n"))

How to replace space/character with specified character after first numeric value in string using C#?

I have String containing Special Characters & Numeric Values .
Eg:
3-3 3
3-3"3/4
3-3-3/4
3-3 3/4
3 3 3
3'3 3
Output must be:
3f3 3
3f3"3/4
3f3-3/4
3f3 3/4
3f3 3
3f3 3
I have tried using :
public static string ReplaceFirst(string text, string search, string replace)
{
int pos = text.IndexOf(search);
if (pos < 0)
{
return text;
}
return text.Substring(0, pos) + replace + text.Substring(pos + search.Length);
}
using above code it replaces the first occurrence with specified character this works fine.
Eg: 3-3 3 Output: 3f3 3
But for 3 3-3 Output: 3 3f3 according to code is correct. but i want to replace space/character after first numeric which would be 3f3-3
Help Appreciated!

Simple loops should work.
for(int i =0; i < myListOfStrings.Count; i++)
{
char[] chars = myListOfStrings[i].ToCharArray();
for (int j = 0; j < chars.Count(); j++)
{
if (Char.IsDigit(chars[j]))
{
if(j + 1 < chars.Count())
{
chars[j + 1] = 'f'; //'f' being your replacing character
myListOfStrings[i] = new string(chars);
}
break;
}
}
}
Output examples
myListOfStrings.Add("3-3 3");
myListOfStrings.Add("3-3-3/4");
myListOfStrings.Add("3 3-3");
myListOfStrings.Add("3 3 3");
3f3 3
3f3-3/4
3f3-3
3f3 3
Update from comments
for (int i = 0; i < myListOfStrings.Count; i++)
{
char[] chars = myListOfStrings[i].ToCharArray();
for (int j = 0; j < chars.Count(); j++)
{
if (!Char.IsDigit(chars[j]))
{
if (j + 1 < chars.Count())
{
chars[j] = 'f'; //'f' being your replacing character
myListOfStrings[i] = new string(chars);
}
break;
}
}
}

var match = Regex.Match(text, search); //To search for any special character, use #"\W" as the second parameter
var editable = text.ToCharArray();
editable[match.Index] = replace[0];
text = new String(editable);
return text;

Following worked for me:
Modified Code:
string S="10-3 3";
char[] chars = S.ToCharArray();
for (int j = 0; j < chars.Count(); j++)
{
if (Char.IsDigit(chars[j]))
{
}
else
{
if (j + 1 < chars.Count())
{
chars[j] = 'f'; //'f' being replacing character
S = new string(chars);
}
break;
}
}
Output: 10f3 3

Parse text and save in memory c#

I have such text
5 1 5 1 5 1 5 1
1
I must get
5 1 5 1 5 1 5 1
0 1 0 0 0 0 0 0
and save it in memory. But when i use such consruction:
List<string> lines=File.ReadLines(fileName);
foreach (string line in lines)
{
var words = line.Split( new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
foreach(string w in words)
Console.Write("{0,6}", w);
// filling out
for (int i = words.Length; i < 8; i++)
Console.Write("{0,6}", "0.");
Console.WriteLine();
}
I only print text in desired format on display.
How I can save it in List<string> newLines?

If we assume the data is meant to be equally spaced (as suggested by your current Write etc, then I would process it as characters:
char[] chars = new char[49];
foreach(string line in File.ReadLines(path))
{
// copy in the data and pad with spaces
line.CopyTo(0, chars, 0, Math.Min(line.Length,chars.Length));
for (int i = line.Length; i < chars.Length; i++)
chars[i] = ' ';
// check every 6th character - if space replace with zero
for (int i = 1; i < chars.Length; i += 6) if (chars[i] == ' ')
chars[i] = '0';
Console.WriteLine(chars);
}
Or if you really need it as lines, use (at the end of each loop iteration):
list.Add(new string(chars));

I assume there is exactly 5 space between numbers. So here is the code:
List<string> lines = System.IO.File.ReadLines(fileName).ToList();
List<string> output = new List<string>();
foreach (string line in lines)
{
var words =
line.Split(new string[] { new string(' ', 5) },
StringSplitOptions.None).Select(input => input.Trim()).ToArray();
Array.Resize(ref words, 8);
words = words.Select(
input => string.IsNullOrEmpty(input) ? " " : input).ToArray();
output.Add(string.Join(new string(' ', 5), words));
}
//output:
// 5 1 5 1 5 1 5 1
// 0 1 0 0 0 0 0 0

You can use this code for producing your desired result :
StreamReader sr = new StreamReader("test.txt");
string s;
string resultText = "";
while ((s = sr.ReadLine()) != null)
{
string text = s;
string[] splitedText = text.Split('\t');
for (int i = 0; i < splitedText.Length; i++)
{
if (splitedText[i] == "")
{
resultText += "0 \t";
}
else
{
resultText += splitedText[i] + " \t";
}
}
resultText += "\n";
}
Console.WriteLine(resultText);
"test.txt" is the text file that contains your text and "resultText" variable contains the result that you want.