Description

To print unique word from a string
    Step 1: Split the string from space and store it into a array
    of string to get all words.
    Step 2: Take two loops one loop is for traversing the array of string.
    Step 3: Second loop is for checking the duplicate elements, if duplicate
    element found break the second loop.
    Step 4: If loop reached to end, print the word.

Example: str : this is java and java is good
         output : this 
                  is
                  java
                  and
                  good

C/C++

/* C program to print unique word of a string*/
//Save it as PrintUniqueWord.c

#include<stdio.h>
int main(){

    int i, j=0, k=0;

    char str[100];
    char newStr[10][20];

    printf("Enter a string : ");
    scanf("%[^\n]s", str);
    
    //Traversing the string
    for(i=0;str[i]!='\0';i++){
        
        //checking for space
        if(str[i]==' '){
            newStr[k][j]='\0';
            k++;
            j=0;
        }else{
            newStr[k][j]=str[i];
            j++;
        }
    }
    newStr[k][j]='\0';

    printf("The unique word of this string : \n");
    for(i=0;i<=k;i++){
        for(j=0;j<=k;j++){
            
            //Storing the string value into temporary variable
            char *temp1 = newStr[i];
            char *temp2 = newStr[j];
            
            /*if second loop encounter same value again but j<i break the loop to
            avoid printing of duplicate value*/
            if(j<i && (strcmp(temp1,temp2) == 0)) {
                break;
            }
            
            /*While traversing the array, if loop reached to last print the
            string with its number of count*/
            if(j==k) {
                printf("%s\n",newStr[i]);
            }
        }
    }

    return 0;
}

Input:
Enter a string : 
this is c and c is good

Output:
The unique word of this string is :
this
is
c
and
good

Java

/* Java program to print unique word of a string*/
//Save it as PrintUniqueWord.java

import java.io.*;
import java.util.Scanner;

public class PrintUniqueWord {

    public static void main(String[] args) {
        
        Scanner scanner = new Scanner(System.in);
        
        System.out.println("Enter a string : ");
        String str = scanner.nextLine();
        
        //Splitting the string by space and storing into string array
        String newStr[] = str.split(" ");
        
        System.out.println("The unique word of this string is :");
        for(int i=0;i<newStr.length;i++) {
            for(int j=0;j<newStr.length;j++) {
                
                //Storing the string value into temporary variable
                String temp1 = newStr[i];
                String temp2 = newStr[j];
                
                /*if second loop encounter same value again but j<i break the loop to 
                avoid printing of duplicate value*/
                if(j<i && temp1.equals(temp2)) {
                    break;
                }
                
                /*While traversing the array, if loop reached to last print the
                string with its number of count*/
                if(j==newStr.length-1) {
                    System.out.println(newStr[i]);
                }
            }
        }
    }
}

Input:
Enter a string : 
this is java and java is good

Output:
The unique word of this string is :
this
is
java
and
good

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