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Code String

Find longest substring with repeating characters

Here given code implementation process.

//C Program
//Find longest substring with repeating characters
#include <stdio.h>

//Function which is finding the longest repeating substring
void longest_repeating_char(char * text, int size)
{
	if (size <= 1)
	{
		return;
	}
	//resultatant variables
	int length = -1, counter = 0, location = 0;
	//Loop controlling variable [i,j]
	int i = 0, j = 0;
	//Loop iterating the string elements
	for (i = 0; i < size; ++i)
	{
		//Reset the counter variable
		counter = 0;
		//Loop which is count the length of repeating substring
		for (j = i + 1; j < size; j++)
		{
			if (text[j] == text[i])
			{
				//When same consecutive elements exist
				counter++;
			}
			else
			{
				//When not same consecutive elements exist
				break;
			}
		}
		if (counter > 0 && counter > length)
		{
			//When get a newly longest repeating substring
			location = i;
			length = counter;
		}
		i += counter;
	}
	printf(" Given String : %s\n", text);
	if (length == -1)
	{
		// If no result exists
		printf(" Not found longest repeating substring\n");
		return;
	}
	//When result are exists
	printf(" Longest Repeating Substring : ");
	for (int i = location; i <= location + length; ++i)
	{
		//Display resultant characters
		printf("%c", text[i]);
	}
	printf("\n");
}
int main()
{
	//Define the character elements
	char str[] = "ABFFFFFAABD";
	//Get the size
	int size = sizeof(str) / sizeof(str[0]) - 1;
	//Find result
	longest_repeating_char(str, size);
	//Other test cases
	char str1[] = "ABCCCDCCCCCABBCC";
	size = sizeof(str1) / sizeof(str1[0]) - 1;
	longest_repeating_char(str1, size);
	char str3[] = "AAAAAA";
	size = sizeof(str3) / sizeof(str3[0]) - 1;
	longest_repeating_char(str3, size);
	char str4[] = "ABC";
	size = sizeof(str4) / sizeof(str4[0]) - 1;
	longest_repeating_char(str4, size);
	return 0;
}

Output

 Given String : ABFFFFFAABD
 Longest Repeating Substring : FFFFF
 Given String : ABCCCDCCCCCABBCC
 Longest Repeating Substring : CCCCC
 Given String : AAAAAA
 Longest Repeating Substring : AAAAAA
 Given String : ABC
 Not found longest repeating substring
//Java Program 
//Find longest substring with repeating characters
class MyString
{
	//Function which is finding the longest repeating substring
	public void longest_repeating_char(String text)
	{
       	int size = text.length();
		if (size <= 1)
		{
			return;
		}
		//resultatant variables
		int length = -1, counter = 0, location = 0;
		//Loop controlling variable [i,j]
		int i = 0, j = 0;
		//Loop iterating the string elements
		for (i = 0; i < size; ++i)
		{
			//Reset the counter variable
			counter = 0;
			//Loop which is count the length of repeating substring
			for (j = i + 1; j < size; j++)
			{
				if (text.charAt(j) == text.charAt(i))
				{
					//When same consecutive elements exist
					counter++;
				}
				else
				{
					break;
				}
			}
			if (counter > 0 && counter > length)
			{
				//When get a newly longest repeating substring
				location = i;
				length = counter;
			}
			i += counter;
		}
		System.out.print(" Given String : " + text + "\n");
		if (length == -1)
		{
			// If no result exists
			System.out.print(" Not found longest repeating substring\n");
			return;
		}
		//When result are exists
		System.out.print(" Longest Repeating Substring : ");
		for (i = location; i <= location + length; ++i)
		{
			System.out.print(text.charAt(i));
		}
		System.out.print("\n");
	}
	public static void main(String[] args)
	{
		MyString obj = new MyString();
		obj.longest_repeating_char("ABFFFFFAABD");
		obj.longest_repeating_char("ABCCCDCCCCCABBCC");
		obj.longest_repeating_char("AAAAAA");
		obj.longest_repeating_char("ABC");
	}
}

Output

 Given String : ABFFFFFAABD
 Longest Repeating Substring : FFFFF
 Given String : ABCCCDCCCCCABBCC
 Longest Repeating Substring : CCCCC
 Given String : AAAAAA
 Longest Repeating Substring : AAAAAA
 Given String : ABC
 Not found longest repeating substring
//Include header file
#include <iostream>
#include<string.h>
using namespace std;

//C++ Program 
//Find longest substring with repeating characters
class MyString
{
	public:
		//Function which is finding the longest repeating substring
		void longest_repeating_char(string text)
		{
			int size = text.size();
			if (size <= 1)
			{
				return;
			}
			//resultatant variables
			int length = -1, counter = 0, location = 0;
			//Loop controlling variable [i,j]
			int i = 0, j = 0;
			//Loop iterating the string elements
			for (i = 0; i < size; ++i)
			{
				//Reset the counter variable
				counter = 0;
				//Loop which is count the length of repeating substring
				for (j = i + 1; j < size; j++)
				{
					if (text[j] == text[i])
					{
						//When same consecutive elements exist
						counter++;
					}
					else
					{
						break;
					}
				}
				if (counter > 0 && counter > length)
				{
					//When get a newly longest repeating substring
					location = i;
					length = counter;
				}
				i += counter;
			}
			cout << " Given String : " << text << "\n";
			if (length == -1)
			{
				// If no result exists
				cout << " Not found longest repeating substring\n";
				return;
			}
			//When result are exists
			cout << " Longest Repeating Substring : ";
			for (i = location; i <= location + length; ++i)
			{
				cout << text[i];
			}
			cout << "\n";
		}
};
int main()
{
	MyString obj = MyString();
	obj.longest_repeating_char("ABFFFFFAABD");
	obj.longest_repeating_char("ABCCCDCCCCCABBCC");
	obj.longest_repeating_char("AAAAAA");
	obj.longest_repeating_char("ABC");
	return 0;
}

Output

 Given String : ABFFFFFAABD
 Longest Repeating Substring : FFFFF
 Given String : ABCCCDCCCCCABBCC
 Longest Repeating Substring : CCCCC
 Given String : AAAAAA
 Longest Repeating Substring : AAAAAA
 Given String : ABC
 Not found longest repeating substring
//Include namespace system
using System;

//C# Program 
//Find longest substring with repeating characters
class MyString
{
	//Function which is finding the longest repeating substring
	public void longest_repeating_char(String text)
	{
		int size = text.Length;
		if (size <= 1)
		{
			return;
		}
		//resultatant variables
		int length = -1, counter = 0, location = 0;
		//Loop controlling variable [i,j]
		int i = 0, j = 0;
		//Loop iterating the string elements
		for (i = 0; i < size; ++i)
		{
			//Reset the counter variable
			counter = 0;
			//Loop which is count the length of repeating substring
			for (j = i + 1; j < size; j++)
			{
				if (text[j] == text[i])
				{
					//When same consecutive elements exist
					counter++;
				}
				else
				{
					break;
				}
			}
			if (counter > 0 && counter > length)
			{
				//When get a newly longest repeating substring
				location = i;
				length = counter;
			}
			i += counter;
		}
		Console.Write(" Given String : " + text + "\n");
		if (length == -1)
		{
			// If no result exists
			Console.Write(" Not found longest repeating substring\n");
			return;
		}
		//When result are exists
		Console.Write(" Longest Repeating Substring : ");
		for (i = location; i <= location + length; ++i)
		{
			Console.Write(text[i]);
		}
		Console.Write("\n");
	}
	public static void Main(String[] args)
	{
		MyString obj = new MyString();
		obj.longest_repeating_char("ABFFFFFAABD");
		obj.longest_repeating_char("ABCCCDCCCCCABBCC");
		obj.longest_repeating_char("AAAAAA");
		obj.longest_repeating_char("ABC");
	}
}

Output

 Given String : ABFFFFFAABD
 Longest Repeating Substring : FFFFF
 Given String : ABCCCDCCCCCABBCC
 Longest Repeating Substring : CCCCC
 Given String : AAAAAA
 Longest Repeating Substring : AAAAAA
 Given String : ABC
 Not found longest repeating substring
<?php
//Php Program 
//Find longest substring with repeating characters
class MyString
{
	//Function which is finding the longest repeating substring
	public	function longest_repeating_char($text)
	{
		$size = strlen($text);
		if ($size <= 1)
		{
			return;
		}
		//resultatant variables
		$length = -1;
		$counter = 0;
		$location = 0;
		//Loop controlling variable [i,j]
		$i = 0;
		$j = 0;
		//Loop iterating the string elements
		for ($i = 0; $i < $size; ++$i)
		{
			//Reset the counter variable
			$counter = 0;
			//Loop which is count the length of repeating substring
			for ($j = $i + 1; $j < $size; $j++)
			{
				if ($text[$j] == $text[$i])
				{
					//When same consecutive elements exist
					$counter++;
				}
				else
				{
					break;
				}
			}
			if ($counter > 0 && $counter > $length)
			{
				//When get a newly longest repeating substring
				$location = $i;
				$length = $counter;
			}
			$i += $counter;
		}
		echo " Given String : ". $text ."\n";
		if ($length == -1)
		{
			echo " Not found longest repeating substring\n";
			return;
		}
		echo " Longest Repeating Substring : ";
		for ($i = $location; $i <= $location + $length; ++$i)
		{
			echo $text[$i];
		}
		echo "\n";
	}
}

function main()
{
	$obj = new MyString();
	$obj->longest_repeating_char("ABFFFFFAABD");
	$obj->longest_repeating_char("ABCCCDCCCCCABBCC");
	$obj->longest_repeating_char("AAAAAA");
	$obj->longest_repeating_char("ABC");
}
main();

Output

 Given String : ABFFFFFAABD
 Longest Repeating Substring : FFFFF
 Given String : ABCCCDCCCCCABBCC
 Longest Repeating Substring : CCCCC
 Given String : AAAAAA
 Longest Repeating Substring : AAAAAA
 Given String : ABC
 Not found longest repeating substring
//Node Js Program 
//Find longest substring with repeating characters
class MyString
{
	//Function which is finding the longest repeating substring
	longest_repeating_char(text)
	{
		var size = text.length;
		if (size <= 1)
		{
			return;
		}
		//resultatant variables
		var length = -1;
		var counter = 0;
		var location = 0;
		//Loop controlling variable [i,j]
		var i = 0;
		var j = 0;
		//Loop iterating the string elements
		for (i = 0; i < size; ++i)
		{
			//Reset the counter variable
			counter = 0;
			//Loop which is count the length of repeating substring
			for (j = i + 1; j < size; j++)
			{
				if (text[j] == text[i])
				{
					//When same consecutive elements exist
					counter++;
				}
				else
				{
					break;
				}
			}
			if (counter > 0 && counter > length)
			{
				//When get a newly longest repeating substring
				location = i;
				length = counter;
			}
			i += counter;
		}
		process.stdout.write(" Given String : " + text + "\n");
		if (length == -1)
		{
			process.stdout.write(" Not found longest repeating substring\n");
			return;
		}
		process.stdout.write(" Longest Repeating Substring : ");
		for (i = location; i <= location + length; ++i)
		{
			process.stdout.write(text[i]);
		}
		process.stdout.write("\n");
	}
}

function main()
{
	var obj = new MyString();
	obj.longest_repeating_char("ABFFFFFAABD");
	obj.longest_repeating_char("ABCCCDCCCCCABBCC");
	obj.longest_repeating_char("AAAAAA");
	obj.longest_repeating_char("ABC");
}
main();

Output

 Given String : ABFFFFFAABD
 Longest Repeating Substring : FFFFF
 Given String : ABCCCDCCCCCABBCC
 Longest Repeating Substring : CCCCC
 Given String : AAAAAA
 Longest Repeating Substring : AAAAAA
 Given String : ABC
 Not found longest repeating substring
# Python 3 Program 
# Find longest substring with repeating characters
class MyString :
	# Function which is finding the longest repeating substring
	def longest_repeating_char(self, text) :
		size = len(text)
		if (size <= 1) :
			return
		
		# resultatant variables
		length = -1
		counter = 0
		location = 0
		# Loop controlling variable [i,j]
		i = 0
		j = 0
		# Loop iterating the string elements
		while (i < size) :
			# Reset the counter variable
			counter = 0
			j = i + 1
			# Loop which is count the length of repeating substring
			while (j < size) :
				if (text[j] == text[i]) :
					# When same consecutive elements exist
					counter += 1
				else :
					break
				
				j += 1
			
			if (counter > 0 and counter > length) :
				# When get a newly longest repeating substring
				location = i
				length = counter
			
			i += counter
			i += 1
		
		print(" Given String : ", text ,"\n", end = "")
		if (length == -1) :
			print(" Not found longest repeating substring\n", end = "")
			return
		
		print(" Longest Repeating Substring : ", end = "")
		i = location
		while (i <= location + length) :
			print(text[i], end = "")
			i += 1
		
		print("\n", end = "")
	

def main() :
	obj = MyString()
	obj.longest_repeating_char("ABFFFFFAABD")
	obj.longest_repeating_char("ABCCCDCCCCCABBCC")
	obj.longest_repeating_char("AAAAAA")
	obj.longest_repeating_char("ABC")

if __name__ == "__main__": main()

Output

 Given String :  ABFFFFFAABD
 Longest Repeating Substring : FFFFF
 Given String :  ABCCCDCCCCCABBCC
 Longest Repeating Substring : CCCCC
 Given String :  AAAAAA
 Longest Repeating Substring : AAAAAA
 Given String :  ABC
 Not found longest repeating substring
# Ruby Program 
# Find longest substring with repeating characters
class MyString

	# Function which is finding the longest repeating substring
	def longest_repeating_char(text)
	
		size = text.length()
		if (size <= 1)
		
			return
		end
		# resultatant variables
		length = -1
		counter = 0
		location = 0
		# Loop controlling variable [i,j]
		i = 0
		j = 0
		# Loop iterating the string elements
		while (i < size)
		
			# Reset the counter variable
			counter = 0
			j = i + 1
			# Loop which is count the length of repeating substring
			while (j < size)
			
				if (text[j] == text[i])
				
					# When same consecutive elements exist
					counter += 1
				else
				
					break
				end
				j += 1
			end
			if (counter > 0 && counter > length)
			
				# When get a newly longest repeating substring
				location = i
				length = counter
			end
			i += counter
			i += 1
		end
		print(" Given String : ", text ,"\n")
		if (length == -1)
		
			#  If no result exists
			print(" Not found longest repeating substring\n")
			return
		end
		# When result are exists
		print(" Longest Repeating Substring : ")
		i = location
		while (i <= location + length)
		
			print(text[i])
			i += 1
		end
		print("\n")
	end
end
def main()

	obj = MyString.new()
	obj.longest_repeating_char("ABFFFFFAABD")
	obj.longest_repeating_char("ABCCCDCCCCCABBCC")
	obj.longest_repeating_char("AAAAAA")
	obj.longest_repeating_char("ABC")
end
main()

Output

 Given String : ABFFFFFAABD
 Longest Repeating Substring : FFFFF
 Given String : ABCCCDCCCCCABBCC
 Longest Repeating Substring : CCCCC
 Given String : AAAAAA
 Longest Repeating Substring : AAAAAA
 Given String : ABC
 Not found longest repeating substring

import scala.util.control.Breaks._
//Scala Program 
//Find longest substring with repeating characters
class MyString
{
	//Function which is finding the longest repeating substring
	def longest_repeating_char(text: String): Unit = {
		var size: Int = text.length();
		if (size <= 1)
		{
			return;
		}
		//resultatant variables
		var length: Int = -1;
		var counter: Int = 0;
		var location: Int = 0;
		//Loop controlling variable [i,j]
		var i: Int = 0;
		var j: Int = 0;
		//Loop iterating the string elements
		while (i < size)
		{
			//Reset the counter variable
			counter = 0;
			j = i + 1;
            breakable {
			//Loop which is count the length of repeating substring
			while (j < size)
			{
				if (text(j) == text(i))
				{
					//When same consecutive elements exist
					counter += 1;
				}
				else
				{
					break;
				}
				j += 1;
			}
            }
			if (counter > 0 && counter > length)
			{
				//When get a newly longest repeating substring
				location = i;
				length = counter;
			}
			i += counter;
			i += 1;
		}
		print(" Given String : " + text + "\n");
		if (length == -1)
		{
			// If no result exists
			print(" Not found longest repeating substring\n");
			return;
		}
		//When result are exists
		print(" Longest Repeating Substring : ");
		i = location;
		while (i <= location + length)
		{
			print(text(i));
			i += 1;
		}
		print("\n");
	}
}
object Main
{
	def main(args: Array[String]): Unit = {
		var obj: MyString = new MyString();
		obj.longest_repeating_char("ABFFFFFAABD");
		obj.longest_repeating_char("ABCCCDCCCCCABBCC");
		obj.longest_repeating_char("AAAAAA");
		obj.longest_repeating_char("ABC");
	}
}

Output

 Given String : ABFFFFFAABD
 Longest Repeating Substring : FFFFF
 Given String : ABCCCDCCCCCABBCC
 Longest Repeating Substring : CCCCC
 Given String : AAAAAA
 Longest Repeating Substring : AAAAAA
 Given String : ABC
 Not found longest repeating substring
//Swift Program 
//Find longest substring with repeating characters
class MyString
{
	//Function which is finding the longest repeating substring
	func longest_repeating_char(_ text: String)
	{
		let size: Int = text.count;
      	let arr = Array(text);
		if (size <= 1)
		{
			return;
		}
		//resultatant variables
		var length: Int = -1;
		var counter: Int = 0;
		var location: Int = 0;
		//Loop controlling variable [i,j]
		var i: Int = 0;
		var j: Int = 0;
		//Loop iterating the string elements
		while (i < size)
		{
			//Reset the counter variable
			counter = 0;
			j = i + 1;
			//Loop which is count the length of repeating substring
			while (j < size)
			{
				if (arr[j] == arr[i])
				{
					//When same consecutive elements exist
					counter += 1;
				}
				else
				{
					break;
				}
				j += 1;
			}
			if (counter > 0 && counter > length)
			{
				//When get a newly longest repeating substring
				location = i;
				length = counter;
			}
			i += counter;
			i += 1;
		}
		print(" Given String : ", text ,"\n", terminator: "");
		if (length == -1)
		{
			print(" Not found longest repeating substring\n", terminator: "");
			return;
		}
		print(" Longest Repeating Substring : ", terminator: "");
		i = location;
		while (i <= location + length)
		{
			print(arr[i], terminator: "");
			i += 1;
		}
		print("\n", terminator: "");
	}
}
func main()
{
	let obj: MyString = MyString();
	obj.longest_repeating_char("ABFFFFFAABD");
	obj.longest_repeating_char("ABCCCDCCCCCABBCC");
	obj.longest_repeating_char("AAAAAA");
	obj.longest_repeating_char("ABC");
}
main();

Output

 Given String :  ABFFFFFAABD
 Longest Repeating Substring : FFFFF
 Given String :  ABCCCDCCCCCABBCC
 Longest Repeating Substring : CCCCC
 Given String :  AAAAAA
 Longest Repeating Substring : AAAAAA
 Given String :  ABC
 Not found longest repeating substring

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