Create a program with constructor of different type and use some overloaded operator

We have to create a program with constructor of different type and use some overloaded operator for comparing & showing subsets of strings.

Class Diagram

Class str

Private: char *input int len

Public : str() str(str &) str operator +(str) int operator =(str) int operator <(str) int operator &\^(str) void getdata() void display()

Solution:

#include <iostream.h> #include <stdio.h> #include <conio.h> #include <string.h> class str{ private:        char *input;        int len; public: str(){        input = "";        } str(str &){        len=strlen(input);        input=new char[len+1];        strcpy(input,s.input);        delete input;        } str operator +(str){        str temp;        strcpy(temp.input,input);        strcat(temp.input,s.input);        return temp;        } int operator =(str){        if (!strcmp(input,s.input))               return 1;        else               return 0;        } int operator <(str){        int len1,len2;        len1=strlen(input);        len2=strlen(s.input);        if (len1<len2)               return 1;        else               return 0;        } int operator ^(str){        char *ptr;        ptr=strstr(input,s.input);        if (ptr=="")               return 0;        else if (!strcmp(s.input,ptr))               return 1;        else if (!strcmp(input,ptr))               return 2;        } void getdata(){        cout<<"Enter your string: ";        gets(input);        } void display(){        cout<<input<<endl;        } }; void main(){        str a,b,c;        a.getdata();        b.getdata();        c=a+b;        c.display();        if (a=b)               cout<<"Both strings are equal.\n";        else if (a<b)               cout<<"String 1 is less than string 2.\n";        if (!(a^b))               cout<<"String 2 is not a substring of string 1.\n";        else if ((a^b)==1)               cout<<"String 2 is a substring of string 1.\n";        else if ((a^b)==2)               cout<<"String 2 is a real subset of string 1.\n";        getch();        }

I made a program that compares, shows substrings & I think I solved the program successfully.