Name of the Program:

Design, develop, and execute a program in C++ to create a class called STRING and implement the following operations. Display the results after every operation by overloading the operator << i) STRING s1 = "VTU" ii) STRING s2 = "BELGAUM" iii) STIRNG s3 = s1 + s2; (Use copy constructor)

Theory:

This program using the the basic fundamentals of C++. Using this program we overload the '+' operator. This program uses the concept of copy constructor and friend ostream function. The copy constructor is a special constructor in the C++ programming language for creating a new object as a copy of an existing object. The friend ostream dunction helps us to overload '<<' operator as it isnt part of the class.

Algorithm:

1. Declare an object called 'STRING'
2. Declare a character array(string).
3. Declare the default constructor intiliazing the string to NULL.
4. Declare a parameterized constructor passing a string to the constructor and initialize the string of the object to the string passed in the constructor
5. Declare a copy constructor copying the contents of existing object to the new object.
6. Using friend ostream function overload '<<' operator.
7. Create a funtion 'operator +()' passing the object as ththe parameter to it and overload the + operator in it.
8. In the main function declare three objects of class STRINGre
9. Intialize the object 1 string to VTU.
10. Intialize the object 2 string to BELGAUM
11. Intialize the object 3 by adding ob1+obj2(using the + operator).
12. Display all the strings.

Code:

stringConcat.cpp

#include<iostream>
#include<string.h>
using namespace std;
class STRING
{
    char  str[100];
    public:
    STRING()
    {
            strcpy(str," ");
    }
    STRING(char *s1)
    {
        strcpy(str,s1);
    }
    STRING(STRING& s)
    {
        strcpy(str,s.str);
    }
    STRING operator +(STRING );
    friend ostream& operator <<(ostream& c,STRING s1)
    {
        c<<s1.str;
        cout<<endl;
        return c;
    }
    };
int main()
{
    STRING s1,s2,s3;
    s1=(char *)"VTU";
    s2=(char *)"BELGAUM";
    s3=s1+s2;
    cout<<"String s1 is = "<<s1;
    cout<<"\n";
    cout<<"String s2 is = "<<s2;
    cout<<"\n";
    cout<<"The concatenated string is ";
    cout<<s3<<"\n";
    return 0;
}
STRING STRING::operator +(STRING s)
{
    strcat(str,s.str);
        return (*this);
}

Output:

Steps for checking output-

• Locate the folder in which the file is present in the terminal.
• Execute the command "g++ the "
• Execute ethe command "./a.out"

Screenshots: