This is my function for validating a char value. So far it doesn't accept any value. I need it to accept Y and N. I can't find the problem.   #include <iostream> #include <limits> using std::cin; using std::cout; char validate(char value){ while (std::cin.fail() || (value != 'Y') || (value != 'y') || (value != 'N') || (value != 'n')) {  cout << "Please input a Y or N." << endl;  cin.clear();  cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n');  cin >> value; } return value;}

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Concept of Pointer Parameter

Pointers are the special variable that stores the variable address, instead of storing the variable value. Pointer is a powerful feature of a programming language. A pointer is mostly used to save memory space and improve execution time.