Overloading +, += Operators
		• Alternative 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 }