Slip 23 - A) Create a C++ class MyString with data member character pointer. Write a C++ program to accept and display a string. Overload ‘+’ operator to concatenate two strings.

Solution:

#include<conio.h>

 #include<iostream>

  #include<string.h>

  using namespace std;

class Mystring

{

    char *str;

    int len;

    public:

    Mystring()

    {}

    Mystring(char s[])

    {

        len=strlen(s);

        str=new char[len+1]; 

        strcpy(str,s);

    }

    void display()

    {

        cout<<endl<<str;

    }

    Mystring operator+(Mystring ob)

    {

        Mystring a; 

        

        int len1,len2;

        len1=strlen(str); 

        len2=strlen(ob.str); 

        a.str=new char[len1+len2+1]; 

        strcpy(a.str,str);

        strcat(a.str,ob.str); 

        return a;

    }

};

int main()

{

char s1[10],s2[20];

cout<<"\n Enter 1st string : "; cin>>s1;

cout<<"\n Enter 2nd string : "; cin>>s2;

Mystring m1(s1),m2(s2),m3; 

m1.display();

m2.display(); 

m3=m1+m2;

m3.display();

return 0;

}