Manipulation of Strings Using operators

C++ allows us to manipulate strings using the concept of operator overload. For example, we may override the + operator to concatenate two strings.

One can override the = = operator to compare two strings. Consider the following example where we override + operator to concatenate two strings.

Example:

#include<iostream>
#include<string.h>
using namespace std;
class string
{ 
 char *name;
 int length;
 public:
 string()
 { 
 length=0;
 name = new char[length+1];
 }
 string(char *n)
 {
 length=strlen(n);
 name= new char [length+1];
 strcpy(name,n);
 }
 void display()
 { 
 cout<<"String:"<<name;
}
 string operator+(string s)
 { 
 string temp;
 strcpy(temp.name,name);
 strcat(temp.name,s.name);
 return temp;
}
};

int main()
{
string s1("Hello");
string s2("Welcome");
string s3;
s1.display();
s2.display();
s3=s1+s2;
s3.display();
return 0;
}