CS202
6- ‹#›
Overloading = Operator
class string {
public:
string(): str(0), len(0) {}; //constructor
string(const string &); //copy constructor
~string(); //destructor
string
& operator = (const string & );
//assignment
•••
private:
char * str;
int len;
};
n
string & operator
= (const string & s2) {
if (this == &s2) //check for self assignment
return *this;
if (str) //current object has a value
delete [] str; //deallocate any dynamic memory
str = new char [s2.len+1];
strcpy(str,s2.str);
len = s2.len;
return *this;
}