c++ - 并行数组以创建数据库来存储C++的动物类型和数量

Question

This is what it's suppose to look like
我这样做正确吗？以及我需要做的另一种编码才能像这样显示。我必须模拟一个数据库来存储动物类型和动物类型计数。我必须使用并行数组进行数据存储。如果我将这个动态分配的数组不包含5个元素，那就更好了。

#include <iostream>
#include <iomanip>
#include <string>

using namespace std;

const int MAX_RECORDS = 5;
const int ADD = 1, DISPLAY = 2, EXIT = 3;

void addAnimal();
void displayAnimal();

int main()
{
    int choice, animal;
    int a = 0;

    do 
    {
        cout << "How many animal records would you like to store (5 max): ";
        cin >> animal;
        cout << endl;

        cout << "1. Add animal(s)" << endl;
        cout << "2. Display animals" << endl;
        cout << "3. Quit" << endl;
        cout << endl;

        do
        {
            cout << "Please enter a menu number: ";
            cin >> choice;
            if (choice <= 0 || choice > EXIT)
            {
                cout << "Error. Please try again.\n";
                cout << endl;
            }
        } while (choice <= 0 || choice > EXIT);

        // Create a muliway branch statement.
        switch (choice)
        {
        case ADD:
            addAnimal();
            break;
        case DISPLAY:
            displayAnimal();
            break;
        case EXIT:
            break;
        }
    } while (choice != EXIT);
        
    cout << endl;
    system("pause");
    return 0;
}

void addAnimal()
{
    string str;
    do
    { 
        cout << "Please enter an animal type (none to stop): " << endl;
        getline(cin, str);
        cout << "Enter the animal type's count: " << endl;
        getline(cin, str);
    } while (str != "goodbye");
    
}
void displayAnimal()
{

}

Answer 1

为了您的目的，我建议您使用std::vector<>。以下是在C++中使用vectors的基本实现。
注意:您需要在顶部提到#include<vector>。

#include<vector>
#include<iostream>

int main(){
    std::vector<int> my_vec; // initializing a vector of integers
    // To add anything to a vector, you can use
    my_vec.push_back(5); // Adds 5 to my_vec
    my_vec.push_back(6); // Adds 6 to my_vec
    
    std::cout << my_vec[0] << std::endl; // Slicing from a vector
    for(auto it:my_vec) std::cout << it << std::endl; // display contents
    return 1;
}

我不能在这个答案中向您展示有关 vector 的所有信息，这是另一个巨大的话题。主要思想是它们是动态的，并且可以在运行时更改大小。与传统的静态数组相比。
C++中的vectors