String compare using operator overloading

In C Language, we use strcmp() or strcmpi() functions to compare two strings. In C++ programs also we use these functions to perform the same job. Operator overloading in C++ helps us to use equality operator to compare two strings in C++ programs.

Here is a C++ program to compare two strings using operator overloading.

#include< iostream.h >

#include< conio.h >

#include< string.h >

const int SIZE=40;

class String

{

private:

char str [SIZE];

public:

String ()

{

strcpy (str," ");

}

String (char ch [])

{

strcpy (str, ch);

}

void getString ()

{

cout<< "Enter the string: -";

cin.get (str, SIZE);

}

int operator == (String s)

{

if (strcmp (str, s.str)==0)

return 1;

else

return 0;

}

};

void main ()

{

clrscr ();

String s1, s2, s3;

s1="Satavisha";

s2="Suddhashil";

s3.getString ();

if (s3==s1)

cout<< "1st and 3rd string are same.";

else if (s2==s3)

cout<< "2nd and 3rd string are same.";

else

cout<< "All strings are unique.";

getch ();

}

Operator overloading is an important chapter in and Students can ask any related question through this blog.