Copy one string to another using recursion

 Problem statement:- Program to copy one string to another using recursion.

Data requirement:-

   Input Data:-str

  Output Data:-str1

Program in C

Here is the source code of the C Program to copy one string to another using recursion.

Code:

#include<stdio.h>

#include<string.h>

void Copy_String(char str[],char str1[],int i)

{

    str1[i]=str[i];

    if(str[i]=='\0')

        return;

    Copy_String(str,str1,i+1);

}

int main()

{

    char str[30];

    printf("Enter your String:");

    scanf("%[^\n]",str);

    char str1[30]="";

    Copy_String(str,str1,0);

    printf("Copy Done...\n");

    printf("Copy string is: %s",str1);

}

Input/Output:

Enter your String:csinfo360.com

Copy Done...

Copy string is: csinfo360.com

Program in C++

Here is the source code of the C++ Program to copy one string to another using recursion.

Code:

#include<iostream>

#include<cstring>

using namespace std;

void Copy_String(string str,char str1[],int i)

{

    str1[i]=str[i];

    if(str[i]=='\0')

        return;

    Copy_String(str,str1,i+1);

}

int main()

{

    string str;

    cout<<"Enter your String:";

    getline(cin, str);

    char str1[30]="";

    Copy_String(str,str1,0);

    cout<<"Copy Done..."<<endl;

    cout<<"Copy string is: "<<str1;

}

Input/Output:

Enter your String:String recursion

Copy Done...

Copy string is: String recursion

Program in Java

Here is the source code of the Java Program to copy one string to another using recursion.

Code:

import java.util.Scanner;

public class StringCopy {

static void Copy_String(char str[],char str1[],int i)

{

    str1[i]=str[i];

    if(str[i]=='\0')

        return;

    Copy_String(str,str1,i+1);

}

public static void main(String[] args) {

        Scanner cs=new Scanner(System.in);

        String str2;

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

        str2=cs.nextLine();

        str2+='\0';

        char str[]=str2.toCharArray();

        char str1[]=new char[str.length];

        Copy_String(str,str1,0);

        System.out.print("Copy Done...\n");

        System.out.print("Copy string is: "+String.valueOf(str1));

    cs.close();

}

}

Input/Output:

Enter your String:info360

Copy Done...

Copy string is: info360

Program in Python

Here is the source code of the Python program to copy one string to another using recursion.

Code:

def Copy_String(str, str1,i):

    str1[i]=str[i]

    if (str[i] == '\0'):

        return

    Copy_String(str, str1, i + 1)

str=input("Enter your String:")

str+='\0'

str1=[0]*(len(str))

Copy_String(str, str1,0)

print("Copy Done...")

print("Copy string is:","".join(str1))

Input/Output:

Enter your String:programming practice

Copy Done...

Copy string is: programming practice 

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