Question

So in my header i made a string: string s; The compiler freaks out at this. I know that string is part of iostream::std. Do I have to include it in the header instead of in the .cpp file then? If so is it bad if other files that use the header include iostream? How do I deal with that?

Edit: Also for vector since it seems I’ll be needing it a lot in my assignment.

Edit2: I remember seeing #ifndef in a lot of examples of headers and I feel like it may help with my question, but I can’t seem to find a good explanation.

Answer 1

string and vector are separate from iostream, and all three are part of the std namespace. You just have to properly qualify them in your header files.

Assignment.h

 #include <string>
 #include <vector>
 // no need to #include <iostream>

 struct Obj
 {
    // fully qualified with std::
    std::string s_;

    // same:
    std::vector<std::string> v_;
 };