Introduction to C++ Operator Overloading

CS202 6- ‹#›

Overloading +, += Operators

nAlternative implementations, not as efficient:

string operator + (const string &s, char *lit) {

string temp;

temp.len = s.len+strlen(lit);

temp.str = new char[temp.len+1];

strcpy(temp.str, s.str);

strcat(temp.str, lit);

return temp;

}

Don’t do the following....

string & string::operator += (const string & s2) {

return *this=*this+s2; //Extra unnecessary deep copies

}