Function problem

[fuzzylr]

I am trying to make a function that repeats till I say exit out. For some strange reason it's complaining about the answers.

Code:

int add()
{
        char answer;
        int a,b;
        int total;

        do
        {
                std::cout<<"Enter two numbers: ";
                std::cin>>a,b;

                total = a+b;
                std::cout<< total <<"\n\n";
                std::cout<<"Do you wish to continue: Y/N";
                std::cin>>answer;
        } while (answer = y || answer = Y);

        std::cout<<"Returning to menu\n\n";
        return 0;
}

Error:

In file included from index.cpp:2:0:
functions.cpp: In function âint add()â:
functions.cpp:9:11: error: âyâ was not declared in this scope
functions.cpp:20:34: error: âYâ was not declared in this scope