// Makes a string of the argument (which is not macro-expanded)
#define STR(a) #a

// Makes a string of the macro expansion of a
#define XSTR(a) STR(a)

STR(MyClass);

"MyClass";

#define a value_a

printf("%s", XSTR(a));

string s = STR("my quoted string");
cout << s;

"my quoted string"