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Find and replace given pattern by given character

Here given code implementation process.

// C Program
// Find and replace given pattern by given character
#include <stdio.h>

void replace(char str[],char pattern[],int s1 ,int s2 ,char key)
{
  if(s1 < 1 || s2 < 1 || s2 > s1) 
  {
    //When get some invalid data
    return;
  }
  printf("String  : %s\n",str);

  printf("Pattern : %s \nReplace By Character [%c]\n",pattern,key);

  int status = 0;

  int x=0;

  for (int i = 0; i < s1;  i++)
  {
  
    status=0;

    if(pattern[0]==str[i])
    {
      //Initial, assume that  pattern are exist
      status=1;

      if(i+(s2-1) < s1)
      {
        for (int j = 1 ; j < s2 && status==1 ; ++j)
        {
          if(str[i+j] != pattern[j])
          {
            //When pattern are not exist
            status=0;
          }
        }
      }
      else
      {
        status=0;
       }
    }
    if(status==1)
    {
      //When need to replace by key
      
      str[x]=key;
      
      //i are incremented by pattern size
      i+=s2-1;
      
    }
    else
    {
      //In case no need to modified character
      str[x]=str[i];
    }
    //Modify the value of index location
    x++;
  }
  //Assign the remaining characters to space characters
  for (int i = x; i < s1; ++i)
  {
    str[i]=' ';
  }
}


int main()
{
  int s1=0,s2=0;
 
  char str1[]="HIBITHIHIGAMEHIINHICODE";

  char pattern1[] = "HI";

  char key='$';

  //Get the size of str
  s1=sizeof(str1)/sizeof(str1[0])-1;

  s2=sizeof(pattern1)/sizeof(pattern1[0])-1;

  
  replace(str1,pattern1,s1,s2,key);  

  printf("Result : %s\n\n",str1);

  //Test case 2

  char str2[]="MYBOBCSITBOBCDOGXOBC";

  char pattern2[] = "OBC";

  key = '@';

  //Get the size of str
  s1=sizeof(str2)/sizeof(str2[0])-1;

  s2=sizeof(pattern2)/sizeof(pattern2[0])-1;


  replace(str2,pattern2,s1,s2,key);  

  printf("Result : %s\n\n",str2);
  return 0;
}

Output

String  : HIBITHIHIGAMEHIINHICODE
Pattern : HI
Replace By Character [$]
Result : $BIT$$GAME$IN$CODE

String  : MYBOBCSITBOBCDOGXOBC
Pattern : OBC
Replace By Character [@]
Result : MYB@SITB@DOGX@

// Java program
// Find and replace given pattern by given character

public class MyString {

  public String replace(String str, String pattern, char key) {
    
    //get the size
    int s1 = str.length() ;
    int s2 = pattern.length();
    
    if (s1 < 1 || s2 < 1 || s2 > s1) 
    {
      //When get some invalid data
      return str;
    }
    System.out.print("String  : "+str);
    System.out.print("\nPattern : "+pattern);
    System.out.print("\nReplace By Character ["+key+"]\n");
   
    boolean status = false;
    String result = "";
    int x = 0;

    for (int i = 0; i < s1; i++) 
    {
      status = false;

      if (pattern.charAt(0) == str.charAt(i)) 
      {
        //Initial, assume that  pattern are exist
        status = true;
        if (i + (s2 - 1) < s1) 
        {
          for (int j = 1; j < s2 && status == true; ++j) 
          {
            if (str.charAt(i + j) != pattern.charAt(j)) 
            {
              //When pattern are not exist
              status = false;
            }
          }
        }
        else 
        {
          status = false;
        }
      }
      if (status == true) 
      {
        //When need to replace by key
        result += key;
        //i are incremented by pattern size
        i += s2 - 1;
      } 
      else 
      {
        //In case no need to modified character
        result += str.charAt(i);
      }
      //Modify the value of index location
      x++;
    }

    return result;
  }
  public static void main(String[] args) 
  {

    MyString obj = new MyString();
    
    String text = "HIBITHIHIGAMEHIINHICODE";
    
    String pattern ="HI";
    
    char key ='$';
    
    text =  obj.replace(text,pattern,key);

    System.out.print("Result : "+text+"\n\n");

    text = "MYBOBCSITBOBCDOGXOBC" ;

    pattern ="OBC";
    
    key ='@';

    text =  obj.replace(text,pattern,key);
    
    System.out.print("Result : "+text+"\n\n");
  }
}

Output

String  : HIBITHIHIGAMEHIINHICODE
Pattern : HI
Replace By Character [$]
Result : $BIT$$GAME$IN$CODE

String  : MYBOBCSITBOBCDOGXOBC
Pattern : OBC
Replace By Character [@]
Result : MYB@SITB@DOGX@

// C++ program
// Find and replace given pattern by given character
#include<iostream>

using namespace std;
class MyString {
	public:
		string replace(string str, string pattern, char key) {
			//get the size
			int s1 = str.size();
			int s2 = pattern.size();
			if (s1 < 1 ||
				s2 < 1 ||
				s2 > s1) {
				return
				//When get some invalid data
				str;
			}
			cout << "String : " << str;
			cout << "\nPattern : " << pattern;
			cout << "\nReplace By Character [" << key << "]\n";
			bool status = false;
			string result = "";
			int x = 0;
			for (int i = 0; i < s1; i++) {
				status = false;
				if (pattern[0] == str[i]) {
					//Initial, assume that  pattern are exist
					status = true;
					if (i + (s2 - 1) < s1) {
						for (int j = 1; j < s2 &&
							status == true; ++j) {
							if (str[i + j] != pattern[j]) {
								//When pattern are not exist
								status = false;
							}
						}
					} else {
						status = false;
					}
				}
				if (status == true) {
					//When need to replace by key
					result += key;
					//i are incremented by pattern size
					i += s2 - 1;
				} else {
					//In case no need to modified character
					result += str[i];
				}
				//Modify the value of index location
				x++;
			}
			return result;
		}
};
int main() {
	MyString obj =  MyString();
	string text = "HIBITHIHIGAMEHIINHICODE";
	string pattern = "HI";
	char key = '$';
	text = obj.replace(text, pattern, key);
	cout << "Result : " << text << "\n\n";
	text = "MYBOBCSITBOBCDOGXOBC";
	pattern = "OBC";
	key = '@';
	text = obj.replace(text, pattern, key);
	cout << "Result : " << text << "\n\n";
	return 0;
}

Output

String : HIBITHIHIGAMEHIINHICODE
Pattern : HI
Replace By Character [$]
Result : $BIT$$GAME$IN$CODE

String : MYBOBCSITBOBCDOGXOBC
Pattern : OBC
Replace By Character [@]
Result : MYB@SITB@DOGX@

// C# program
// Find and replace given pattern by given character
using System;
public class MyString {
	public String replace(String str, String pattern, char key) {
		//get the size
		int s1 = str.Length;
		int s2 = pattern.Length;
		if (s1 < 1 ||
			s2 < 1 ||
			s2 > s1) {
			return str;
		}
		Console.Write("String : " + str);
		Console.Write("\nPattern : " + pattern);
		Console.Write("\nReplace By Character [" + key + "]\n");
		Boolean status = false;
		String result = "";
		int x = 0;
		for (int i = 0; i < s1; i++) {
			status = false;
			if (pattern[0] == str[i]) {
				//Initial, assume that  pattern are exist
				status = true;
				if (i + (s2 - 1) < s1) {
					for (int j = 1; j < s2 &&
						status == true; ++j) {
						if (str[i + j] != pattern[j]) {
							//When pattern are not exist
							status = false;
						}
					}
				} else {
					status = false;
				}
			}
			if (status == true) {
				//When need to replace by key
				result += key;
				//i are incremented by pattern size
				i += s2 - 1;
			} else {
				//In case no need to modified character
				result += str[i];
			}
			//Modify the value of index location
			x++;
		}
		return result;
	}
	public static void Main(String[] args) {
		MyString obj = new MyString();
		String text = "HIBITHIHIGAMEHIINHICODE";
		String pattern = "HI";
		char key = '$';
		text = obj.replace(text, pattern, key);
		Console.Write("Result : " + text + "\n\n");
		text = "MYBOBCSITBOBCDOGXOBC";
		pattern = "OBC";
		key = '@';
		text = obj.replace(text, pattern, key);
		Console.Write("Result : " + text + "\n\n");
	}
}

Output

String : HIBITHIHIGAMEHIINHICODE
Pattern : HI
Replace By Character [$]
Result : $BIT$$GAME$IN$CODE

String : MYBOBCSITBOBCDOGXOBC
Pattern : OBC
Replace By Character [@]
Result : MYB@SITB@DOGX@

<?php
// Php program
// Find and replace given pattern by given character
class MyString {
	public 	function replace($str, $pattern, $key) {
		//get the size
		$s1 = strlen($str);
		$s2 = strlen($pattern);
		if ($s1 < 1 ||
			$s2 < 1 ||
			$s2 > $s1) {
			return $str;
		}
		echo("String : ". $str);
		echo("\nPattern : ". $pattern);
		echo("\nReplace By Character [". $key ."]\n");
		$status = false;
		$result = "";
		$x = 0;
		for ($i = 0; $i < $s1; $i++) {
			$status = false;
			if ($pattern[0] == $str[$i]) {
				//Initial, assume that  pattern are exist
				$status = true;
				if ($i + ($s2 - 1) < $s1) {
					for ($j = 1; $j < $s2 &&
						$status == true; ++$j) {
						if ($str[$i + $j] != $pattern[$j]) {
							//When pattern are not exist
							$status = false;
						}
					}
				} else {
					$status = false;
				}
			}
			if ($status == true) {
				//When need to replace by key
				$result .= $key;
				//i are incremented by pattern size
				$i += $s2 - 1;
			} else {
				//In case no need to modified character
				$result .= $str[$i];
			}
			//Modify the value of index location
			$x++;
		}
		return $result;
	}
}

function main() {
	$obj = new MyString();
	$text = "HIBITHIHIGAMEHIINHICODE";
	$pattern = "HI";
	$key = '$';
	$text = $obj->replace($text, $pattern, $key);
	echo("Result : ". $text ."\n\n");
	$text = "MYBOBCSITBOBCDOGXOBC";
	$pattern = "OBC";
	$key = '@';
	$text = $obj->replace($text, $pattern, $key);
	echo("Result : ". $text ."\n\n");

}
main();

Output

String : HIBITHIHIGAMEHIINHICODE
Pattern : HI
Replace By Character [$]
Result : $BIT$$GAME$IN$CODE

String : MYBOBCSITBOBCDOGXOBC
Pattern : OBC
Replace By Character [@]
Result : MYB@SITB@DOGX@

// Node Js program
// Find and replace given pattern by given character
class MyString {
	replace(str, pattern, key) {
		//get the size
		var s1 = str.length;
		var s2 = pattern.length;
		if (s1 < 1 ||
			s2 < 1 ||
			s2 > s1) {
			return str;
		}

		process.stdout.write("String : " + str);
		process.stdout.write("\nPattern : " + pattern);
		process.stdout.write("\nReplace By Character [" + key + "]\n");
		var status = false;
		var result = "";
		var x = 0;
		for (var i = 0; i < s1; i++) {
			status = false;
			if (pattern[0] == str[i]) {
				//Initial, assume that  pattern are exist
				status = true;
				if (i + (s2 - 1) < s1) {
					for (var j = 1; j < s2 &&
						status == true; ++j) {
						if (str[i + j] != pattern[j]) {
							//When pattern are not exist
							status = false;
						}
					}
				} else {
					status = false;
				}
			}

			if (status == true) {
				//When need to replace by key
				result += key;
				//i are incremented by pattern size
				i += s2 - 1;
			} else {
				//In case no need to modified character
				result += str[i];
			}

			//Modify the value of index location
			x++;
		}

		return result;
	}
}

function main(args) {
	var obj = new MyString();
	var text = "HIBITHIHIGAMEHIINHICODE";
	var pattern = "HI";
	var key = '$';
	text = obj.replace(text, pattern, key);
	process.stdout.write("Result : " + text + "\n\n");
	text = "MYBOBCSITBOBCDOGXOBC";
	pattern = "OBC";
	key = '@';
	text = obj.replace(text, pattern, key);
	process.stdout.write("Result : " + text + "\n\n");
}

main();

Output

String : HIBITHIHIGAMEHIINHICODE
Pattern : HI
Replace By Character [$]
Result : $BIT$$GAME$IN$CODE

String : MYBOBCSITBOBCDOGXOBC
Pattern : OBC
Replace By Character [@]
Result : MYB@SITB@DOGX@

#  Python 3 program
#  Find and replace given pattern by given character
class MyString :
	def replace(self, str, pattern, key) :
		s1 = len(str)
		s2 = len(pattern)
		if (s1 < 1 or s2 < 1 or s2 > s1) :
			return str
		
		print("String : ", str, end = "")
		print("\nPattern : ", pattern, end = "")
		print("\nReplace By Character [", key ,"]\n", end = "")
		status = False
		result = ""
		x = 0
		i = 0
		while (i < s1) :
			status = False
			if (pattern[0] == str[i]) :
				# Initial, assume that  pattern are exist
				status = True
				if (i + (s2 - 1) < s1) :
					j = 1
					while (j < s2 and status == True) :
						if (str[i + j] != pattern[j]) :
							# When pattern are not exist
							status = False
						
						j += 1
					
				else :
					status = False
				
			
			if (status == True) :
				# When need to replace by key
				result += key
				# i are incremented by pattern size
				i += s2 - 1
			else :
				# In case no need to modified character
				result += str[i]
			
			# Modify the value of index location
			x += 1
			i += 1
		
		return result
	

def main() :
	obj = MyString()
	text = "HIBITHIHIGAMEHIINHICODE"
	pattern = "HI"
	key = '$'
	text = obj.replace(text, pattern, key)
	print("Result : ", text ,"\n\n", end = "")
	text = "MYBOBCSITBOBCDOGXOBC"
	pattern = "OBC"
	key = '@'
	text = obj.replace(text, pattern, key)
	print("Result : ", text ,"\n\n", end = "")


if __name__ == "__main__":
	main()

Output

String :  HIBITHIHIGAMEHIINHICODE
Pattern :  HI
Replace By Character [ $ ]
Result :  $BIT$$GAME$IN$CODE

String :  MYBOBCSITBOBCDOGXOBC
Pattern :  OBC
Replace By Character [ @ ]
Result :  MYB@SITB@DOGX@

#  Ruby program
#  Find and replace given pattern by given character
class MyString 
	def replace(str, pattern, key) 
		s1 = str.length()
		s2 = pattern.length()
		if (s1 < 1 ||
			s2 < 1 ||
			s2 > s1) 
			return str
		end
		print("String  :", str)
		print("\nPattern  :", pattern)
		print("\nReplace By Character [", key ,"]\n")
		status = false
		result = ""
		x = 0
		i = 0
		while (i < s1) 
			status = false
			if (pattern[0] == str[i]) 
				# Initial, assume that  pattern are exist
				status = true
				if (i + (s2 - 1) < s1) 
					j = 1
					while (j < s2 &&
						status == true) 
						if (str[i + j] != pattern[j]) 
							# When pattern are not exist
							status = false
						end
						j += 1
					end
				else 
					status = false
				end
			end
			if (status == true) 
				# When need to replace by key
				result += key
				# i are incremented by pattern size
				i += s2 - 1
			else 
				# In case no need to modified character
				result += str[i]
			end
			# Modify the value of index location
			x += 1
			i += 1
		end
		return result
	end
end
def main() 
	obj = MyString.new()
	text = "HIBITHIHIGAMEHIINHICODE"
	pattern = "HI"
	key = '$'
	text = obj.replace(text, pattern, key)
	print("Result  :", text ,"\n\n")
	text = "MYBOBCSITBOBCDOGXOBC"
	pattern = "OBC"
	key = '@'
	text = obj.replace(text, pattern, key)
	print("Result  :", text ,"\n\n")
end
main()

Output

String  :HIBITHIHIGAMEHIINHICODE
Pattern  :HI
Replace By Character [$]
Result  :$BIT$$GAME$IN$CODE

String  :MYBOBCSITBOBCDOGXOBC
Pattern  :OBC
Replace By Character [@]
Result  :MYB@SITB@DOGX@


// Scala program
// Find and replace given pattern by given character
class MyString {
	def replace(str: String, pattern: String, key: Char): String = {
		var s1: Int = str.length();
		var s2: Int = pattern.length();

		if (s1 < 1 ||
			s2 < 1 ||
			s2 > s1) {
			return str;
		}
		print("String : " + str);
		print("\nPattern : " + pattern);
		print("\nReplace By Character [" + key + "]\n");
		var status: Boolean = false;
		var result: String = "";
		var x: Int = 0;
		var i: Int = 0;
		while (i < s1) {
			status = false;

			if (pattern(0) == str(i)) {
				//Initial, assume that  pattern are exist
				status = true;

				if (i + (s2 - 1) < s1) {
					var j: Int = 1;
					while (j < s2 &&
						status == true) {
						if (str(i + j) != pattern(j)) {
							//When pattern are not exist
							status = false;
						}
						j += 1;
					}
				} else {
					status = false;
				}
			}
			if (status == true) {
				//When need to replace by key
				result += key;

				//i are incremented by pattern size
				i += s2 - 1;
			} else {
				//In case no need to modified character
				result += str(i);
			}
			//Modify the value of index location
			x += 1;
			i += 1;
		}
		return result;
	}
}
object Main {
	def main(args: Array[String]): Unit = {
		var obj: MyString = new MyString();
		var text: String = "HIBITHIHIGAMEHIINHICODE";
		var pattern: String = "HI";
		var key: Char = '$';
		text = obj.replace(text, pattern, key);
		print("Result : " + text + "\n\n");
		text = "MYBOBCSITBOBCDOGXOBC";
		pattern = "OBC";
		key = '@';
		text = obj.replace(text, pattern, key);
		print("Result : " + text + "\n\n");
	}
}

Output

String : HIBITHIHIGAMEHIINHICODE
Pattern : HI
Replace By Character [$]
Result : $BIT$$GAME$IN$CODE

String : MYBOBCSITBOBCDOGXOBC
Pattern : OBC
Replace By Character [@]
Result : MYB@SITB@DOGX@

// Swift program
// Find and replace given pattern by given character
class MyString {
	func replace(_ text: String, _ pt: String, _ key: Character) -> String {
      	var str = Array(text);
      	var pattern = Array(pt);
		let s1: Int = str.count;
		let s2: Int = pattern.count;
		if (s1 < 1 ||
			s2 < 1 ||
			s2 > s1) {
			return text;
		}
		print("String : ", text, terminator: "");
      	print("\nPattern : ", pt, terminator: "");
      	print("\nReplace By Character [", key ,"]\n", terminator: "");
		var status: Bool = false;
		var result: String = "";
		var x: Int = 0;
		var i: Int = 0;
		while (i < s1) {
			status = false;
			if (pattern[0] == str[i]) {
				//Initial, assume that  pattern are exist
				status = true;
				if (i + (s2 - 1) < s1) {
					var j: Int = 1;
					while (j < s2 &&
						status == true) {
						if (str[i + j] != pattern[j]) {
							//When pattern are not exist
							status = false;
						}
						j += 1;
					}
				} else {
					status = false;
				}
			}
			if (status == true) {
				//When need to replace by key
				result += String(key);
				//i are incremented by pattern size
				i += s2 - 1;
			} else {
				//In case no need to modified character
				result += String(str[i]);
			}
			//Modify the value of index location
			x += 1;
			i += 1;
		}
		return result;
	}
}
func main() {
	let obj: MyString = MyString();
	var text: String = "HIBITHIHIGAMEHIINHICODE";
	var pattern: String = "HI";
	var key: Character = "$";
	text = obj.replace(text, pattern, key);
	print("Result : ", text ,"\n\n", terminator: "");
	text = "MYBOBCSITBOBCDOGXOBC";
	pattern = "OBC";
	key = "@";
	text = obj.replace(text, pattern, key);
	print("Result : ", text ,"\n\n", terminator: "");
}
main();

Output

String :  HIBITHIHIGAMEHIINHICODE
Pattern :  HI
Replace By Character [ $ ]
Result :  $BIT$$GAME$IN$CODE

String :  MYBOBCSITBOBCDOGXOBC
Pattern :  OBC
Replace By Character [ @ ]
Result :  MYB@SITB@DOGX@
Last updated on by Kalkicode




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