Remove duplicate characters from a given string

Problem statement:- Program to Remove duplicate characters from a given string.

Example:-

              Input: Given

                                 String=CPP STRING PROGRAM

             Output: CP STRING OAM

            Input: Given

                                String=c++ string question

             Output: c+ string queo

Data requirement:-

   Input Data:- str

  Output Data:-str

  Additional Data:- i, len, arr

Program in C

Here is the source code of the C Program to Remove duplicate characters from a given string.

Code:

#include<stdio.h>

#include<string.h>

main()

{

    char str[30];

    printf("Enter your String:");

    scanf("%[^\n]",str);

    int arr[256]={0},i;

    for(i=0;i<strlen(str);i++)

    {

        if(str[i]!=' ')

        arr[str[i]]++;

    }

    printf("After Removing Duplicate character from a given string is:");

    for(i=0;i<strlen(str);i++)

    {

        if(str[i]!=' '){

        if(arr[str[i]] !=0)

        {

            printf("%c",str[i]);

            arr[str[i]]=0;

        }}

        else

        {

            printf("%c",str[i]);

        }

    }

}

Input/Output:

Enter your String:CPP STRING PROGRAM

After Removing Duplicate character from a given string is:CP STRING OAM

Program in C++

Here is the source code of the C++ Program to Remove duplicate characters from a given string.

Code:

#include<iostream>

#include <cstring>

using namespace std;

main()

{

    string str;

    cout<<"Enter your String:";

    getline(cin,str);

    int in,len=0,i,max=-1;

    char sub_str[100][100]={0};

    for(in=0;str[in]!='\0';in++)

    {

        len++;

    }

    int arr[256]={0};

    for(i=0;i<len;i++)

    {

        if(str[i]!=' ')

        arr[str[i]]++;

    }

    cout<<"After Removing Duplicate character from a given string:";

    for(i=0;i<len;i++)

    {

        if(str[i]!=' '){

        if(arr[str[i]]!=0)

        {

            cout<<str[i];

            arr[str[i]]=0;

        }}

        else

        {

            cout<<str[i];

        }

    }

}

Input/Output:

Enter your String:c++ string question

After Removing Duplicate character from a given string:c+ string queo

Program in Java

Here is the source code of the Java Program to Remove duplicate characters from a given string.

Code:

import java.util.Scanner;

public class RemovingDuplicateCharacter {

public static void main(String[] args) {

Scanner cs=new Scanner(System.in);

String str;

System.out.println("Enter your String:");

str=cs.nextLine();

int i;

    int arr[]=new int[256];

    for(i=0;i<str.length();i++)

    {

        if(str.charAt(i)!=' ')

            arr[str.charAt(i)]++;

    }

    System.out.print("After Removing Duplicate character from a given string is:");

    for (i =0; i <str.length(); i++) {

    if(str.charAt(i)!=' '){

    if(arr[str.charAt(i)]!=0){

    System.out.print(str.charAt(i));

    arr[str.charAt(i)]=0;

   }

  }

    else

    {

    System.out.print(str.charAt(i));

    }

    }

    cs.close();

}

}

Input/Output:

Enter your String:

removing Duplicate character

After Removing Duplicate character from a given string is:removing Duplcat h

Program in Python

Here is the source code of the Python Program to Remove duplicate characters from a given string.

Code:

str=input("Enter Your String:")

arr=[0]*256

for i in range(len(str)):

    if str[i]!=' ':

        num=ord(str[i])

        arr[num]+=1

print("After Removing Duplicate character from a given string is:")

for i in range(len(str)):

    if str[i]!=' ':

        if arr[ord(str[i])] !=0:

            print(str[i],end="")

            arr[ord(str[i])]=0

    else:

        print(str[i], end="")

Input/Output:

Enter Your String:python string question

After Removing Duplicate character from a given string is:

python srig que

More:-

C/C++/Java/Python Practice Question