How to write a structure to a file and read it back?

Question

C++ / C#

It is necessary to write the structure to a file, and then use it again.

struct Lesson {

  int number;
  string day;
  string lessonName;
  string groupName;
  string teacher;
  string classroom;
};

Answer 1

1. Use the standard ofstream and ifstream
2. Write term by term, for strings write first size_t length, then the string itself
3. Read in the same order as written, after reading number, consider the next size_t as the size of day, and so on.