CONCATENATE ONE STRING TO ANOTHER USING BINARY OPERATOR OVERLOADING

15. Write a program to concatenate one string to another using binary operator overloading.

/* CONCATENATE ONE STRING TO ANOTHER USING BINARY OPERATOR OVERLOADING */ 

#include<iostream>

#include<string.h>

using namespace std;

class str 

{

        char *st;

public:

        str(int len, char *s)

        {  

               int l=strlen(s);

               st= new char[l];

               st=s; 

        }

        str()

        {

        }

        void put();

        str operator +(str);

};

str str :: operator +(str s) 

{  /*str abc;

abc.st=strcat(st, s.st);

return abc;*/

        st=strcat(st, s.st);

        return *this;

}

void str :: put()

{

  cout<<"\n The string after concatenation is : \n"<<st;

}

int main() 

{

        char str1[30], str2[30];

        cout<<"\n Enter a string \n";

        cin>>str1;

        cout<<"\n Enter the 2nd string \n";

        cin>>str2;

        int l1= strlen(str1), l2=strlen(str2);

        str s2(l1,str1), s3(l2,str2), s4;

        s4=s2+s3;

        s4.put();

        return 0;

}