如何創建指針數組一個struct

Question

我有這個

struct Book{ 
    string id; 
    string title; 
    string author; 
}; 

，然後我要動態地創建指向該結構的數組。我已經試過這個，我得到分段錯誤。

Book *array[]= (Book*) malloc(sizeof(Book)); 

我想創建一個書籍列表（標識，標題，作者）。我應該嘗試創建一個結構數組嗎？

Answer 1

不..

保持一個std::vector<Book>代替。

---

#include <string> 
#include <vector> 
#include <iostream> 

struct Book { 
    std::string id; 
    std::string title; 
    std::string author; 
}; 

int main() 
{ 
    Book b1 = { "0", "Title1", "Author1" }; 
    Book b2 = { "1", "Title2", "Author2" }; 

    std::vector<Book> books; 
    books.push_back(b1); 
    books.push_back(b2); 

    std::cout << books.at(0).title << std::endl; 
    // Expected output: "Title1" 
} 

Simple！