Question

New to C++. Just making a simple struct/array program. Why can’t I pass an array of structs like I intend to here?

int NumGrads();

int main()
{
      struct Student {
          int id;
          bool isGrad;
      }; 

    const size_t size = 2;
    Student s1, s2;
    Student students[size] = { { 123, true },
                             { 124, false } };

    NumGrads(students, size);

    std::cin.get();
    return 0;
}

int NumGrads(Student Stu[], size_t size){

}

I appreciate that it must be something to do with passing by either reference or value, but surely if I’ve defined it in main(), I shouldn’t be getting an error with the parameter of NumGrads?

Answer 1

Student is defined in main().
Define it outside of main so that it’s in the same scope as NumGrads:

 struct Student
 {
      int id;
      bool isGrad;
 };

 int main()
 {
      ...
 }