Program to find the duplicate words in a string

Python

string = "big black bug bit a big black dog on his big black nose";  
   
#Converts the string into lowercase  
string = string.lower();  
   
#Split the string into words using built-in function  
words = string.split(" ");  
   
print("Duplicate words in a given string : ");  
for i in range(0, len(words)):  
    count = 1;  
    for j in range(i+1, len(words)):  
        if(words[i] == (words[j])):  
            count = count + 1;  
            #Set words[j] to 0 to avoid printing visited word  
            words[j] = "0";  
              
    #Displays the duplicate word if count is greater than 1  
    if(count > 1 and words[i] != "0"):  
        print(words[i]);  

Output:

 Duplicate words in a given string : 
big
black

C

#include <stdio.h>  
#include <string.h>  
   
int main()  
{     
    char string[] = "big black bug bit a big black dog on his big black nose";  
    char words[100][100];  
    int i = 0, j = 0, k, length, count;  
      
    //Split the string into words such that each row of array words represents a word  
    for(k=0; string[k]!='\0'; k++){  
          
        //Here, i represents row and j represents column of two-dimensional array words  
        if(string[k] != ' ' && string[k] != '\0'){  
            //Converts the string into lowercase and add it to array words  
            words[i][j++] = tolower(string[k]);  
        }  
        else{  
            words[i][j] = '\0';  
            //Increment row count to store new word  
            i++;  
            //Set column count to 0  
            j = 0;  
        }  
    }  
      
    //Store row count in variable length  
    length = i+1;  
      
    printf("Duplicate words in the given string: \n");  
    for(i = 0; i < length; i++){  
        count = 1;  
        for(j = i+1; j < length; j++){  
           if(strcmp(words[i], words[j]) == 0 && (strcmp(words[j],"0") != 0)){  
               count++;  
               //Set words[j] to 0 to avoid printing visited word  
               strcpy(words[j],"0");  
           }   
        }  
        //Displays the duplicate word if count is greater than 1  
        if(count > 1 )  
            printf("%s\n", words[i]);  
    }  
    
    return 0;  
}

Output:

Duplicate words in a given string : 
big
black

JAVA

public class DuplicateWord {  
    public static void main(String[] args) {  
        String string = "Big black bug bit a big black dog on his big black nose";  
        int count;  
          
        //Converts the string into lowercase  
        string = string.toLowerCase();  
          
        //Split the string into words using built-in function  
        String words[] = string.split(" ");  
          
        System.out.println("Duplicate words in a given string : ");   
        for(int i = 0; i < words.length; i++) {  
            count = 1;  
            for(int j = i+1; j < words.length; j++) {  
                if(words[i].equals(words[j])) {  
                    count++;  
                    //Set words[j] to 0 to avoid printing visited word  
                    words[j] = "0";  
                }  
            }  
              
            //Displays the duplicate word if count is greater than 1  
            if(count > 1 && words[i] != "0")  
                System.out.println(words[i]);  
        }  
    }  
}  

Output:

Duplicate words in a given string : 
big
black

C#

 using System;  
                      
public class DuplicateWord  
{  
    public static void Main()  
    {  
        String string1 = "Big black bug bit a big black dog on his big black nose";  
        int count;  
          
        //Converts the string into lowercase  
        string1 = string1.ToLower();  
          
        //Split the string into words using built-in function  
        String[] words = string1.Split(' ');  
          
        Console.WriteLine("Duplicate words in a given string : ");  
        for(int i = 0; i < words.Length; i++) {  
            count = 1;  
            for(int j = i+1; j < words.Length; j++) {  
                if(words[i].Equals(words[j])) {  
                    count++;  
                    //Set words[j] to 0 to avoid printing visited word  
                    words[j] = "0";  
                }  
            }  
              
            //Displays the duplicate word if count is greater than 1  
            if(count > 1 && words[i] != "0")  
                Console.WriteLine(words[i]);  
        }  
    }  
}  

Output:

Duplicate words in a given string : 
big
Black

PHP

<!DOCTYPE html>  
<html>  
<body>  
<?php  
$string = "Big black bug bit a big black dog on his big black nose";  
$count;  
   
//Converts the string into lowercase  
$string = strtolower($string);  
   
//Split the string into words using built-in function  
$words = explode(" ", $string);  
   
print("Duplicate words in a given string : <br>");  
for($i = 0; $i < count($words); $i++) {  
    $count = 1;  
    for($j = $i+1; $j < count($words); $j++) {  
        if($words[$i] == $words[$j]) {  
            $count++;  
            //Set words[j] to 0 to avoid printing visited word  
            $words[$j] = "0";  
        }  
    }  
      
    //Displays the duplicate word if count is greater than 1  
    if($count > 1 && $words[$i] != "0"){  
        print($words[$i]);  
        print("<br>");  
    }  
}  
?>  
</body>  
</html> 

Output:

Duplicate words in a given string : 
big
black