How to assign values to String using vector?

Question

struct Books{

std::string title;
std::string author;
std::string des;
int book_id = 0;
char identifier;

} ;

// book 0
book[0].title = "Programming Fundamentals"; // subscript out of range
book[0].author, "Robert Hanks";
book[0].des, "Programming Basics";
book[0].book_id = 101;
book[0].identifier = 'P';

// Struct Object
std::vector <Books> book;

When ever I try to compile the above code its giving me a subscript out of range error.

Am I doing something wrong?

Thanks.

Nitin · Accepted Answer · 2018-01-27 18:46:10Z

1

you have created an empty vector and trying to access it's elements by book[0] statement, that is not correct. you need to have atleast one element in the vector before accessing it using book[0].

Initialize your vector to have atleast one element in the vector. I am giving one example below to fix it.

  // Struct Object
  std::vector <Books> book(1);

  // book 0
  book[0].title = "Programming Fundamentals"; // subscript out of range
  ....
  ....

answered Jan 27, 2018 at 18:46

Nitin

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