C++创建一个类数组并打印它

似乎正确创建了Player类

不，没有。

Player::Player() {
/*I'm adding info to the Player class first, it works fine and is irrelevant to my question so I didn't paste it here*/
//now I'm creating an array of Item classes and giving them values:
Item Inventory[4] = { Item("generic name", 5, 5), Item("generic name", 5, 5), 
Item("generic name", 5, 5), Item("generic name", 5, 5) };    

}

您正在Player构造函数中创建一个名为Inventory的Item数组，它是一个局部变量，而不是引用您的成员变量Inventory。

因此，当构造函数结束时，本地数组Inventory将被销毁。。。

顺便问一下，为什么要使用库存数组的指针？通过使用数组本身，可以很容易地做到这一点。

然后数组出现问题，整个数组崩溃。

void Player::plprint() {
/*printing the info about the Player class here first, again, works fine and is irrelevant so I didn't copypaste it*/
//printing the "Inventory" array:
cout << "Your inventory contains:" << endl;
for (int i=1;i<invsize;i++) {
Inventory[i].itprint();
}

}

这是因为您从1开始计数和打印数组，所以数组应该从0开始。所以你应该使用for (int i = 0; i < invsize - 1; ++i) {/*...*/}重要的是，在C++或几乎所有编程语言中，数组从0开始

您缺少类Item的默认构造函数，所以当您试图声明Item Inventory或Item Inventory[4]时，if会给您一个错误

固定代码：

#include <iostream>
#include <string>
using namespace std;
const int invsize = 5;
//first class:
class Item {
private:
//i'm supposed to have all values set to private
string itname;
int itpower;
int itlasting;
public:
//this is so I can create an array of those classes later:
Item() {};
Item(string i, int j, int k) { itname = i; itpower = j; itlasting = k; }
//a method to print this class:
void itprint() { cout << itname << " " << itpower << " " << itlasting << std::endl; };
~Item() {};
};
//second class:
class Player {
private:
string plname;
int plrole;
int plbrain;
int plbrawn;
//aggregation:
Item Inventory [4];
public:
void plprint();
Player();
~Player();
};
//a Player constructor, in which I want to create the array of "Items" also:
Player::Player() {
/*I'm adding info to the Player class first, it works fine and is irrelevant to my question so I didn't paste it here*/
//now I'm creating an array of Item classes and giving them values:
for (int i = 0; i < 4; ++i)
{
Inventory[i] = Item("generic name", 5, 5);
}
};
//a method to print the Player class and the "Inventory" array:
void Player::plprint() {
/*printing the info about the Player class here first, again, works fine and is irrelevant so I didn't copypaste it*/
//printing the "Inventory" array:
cout << "Your inventory contains:" << endl;
for (int i = 0; i<invsize - 1; i++) {
Inventory[i].itprint();
}
}
//and finally the main:
int main() {
//creating a Player class - as I understand, the "Inventory" array should get created with it   
Player * firstPlayer = new Player;
//printing the created object and its inventory
firstPlayer->plprint();
system("pause");
return 0;
}