List different types operators which cannot be overloaded? Write a program to read two strings and concatenate them showing the example of operator overloading.
Operators that cannot be overloaded in C++ are: The scope resolution operator (::) The member selector operator (. or .*) The ternary operator (?:) The sizeof operator The typeid operator The comma operator (,) Here's an example program that demonstrates operator overloading to concatenate two strings: #include <iostream> #include <cstring> using namespace std; class String { private: char* str; public: String() { str = new char[1]; *str = '\0'; } String(const char* s) { str = new char[strlen(s) + 1]; strcpy(str, s); } ~String() { delete[] str; } String operator+ (const String& s) { String result; delete[] result.str; res...