当我尝试在 C++ 中编译和运行我的 "main.cpp" 文件时，是什么导致调用 abort 方法？

Question

我目前正在用 C++ 开发一个项目，我有 3 个文件。 Customer.h、Customer.cpp 和 Main.cpp，每当我尝试运行 main.cpp 文件时，我都会收到一条错误消息并调用中止方法。我的 3 个文件中的任何代码都没有问题或任何其他错误消息，我不确定是什么导致了错误，我们将不胜感激！

下面是来自“Main.cpp”的代码，因为我还不能上传任何图片

#include "Customer.h"
using namespace std;


int main()
{
    Customer cust1;

    cust1.setCustomerID(150032);
    cust1.setTitle("Mr");
    cust1.setName("Joey");
    cust1.setNumOfPurchases(3);
    cust1.setPurchases(366, 352, 334);
    cust1.setType("New");

    cout << cust1.getCustomerID() << endl;
    cout << cust1.getTitle() << endl;
    cout << cust1.getName() << endl;
    cout << cust1.getNumOfPurchases() << endl;
    cout << cust1.getPurchases() << endl;
    cout <<  cust1.getType() << endl;
   
    return 0;
}

下面 Customer.h 文件中的代码

class Customer
{
private:
    int customerID;
    string title;
    string name;
    int numOfPurchases;
    int* purchases;
    string type;

public:
    Customer(); // default constructor
    Customer(int customerID, string title, string name, int numOfPurchases, int purchase1, int purchase2, int purchase3, string type);
    
    //copy overload assignment
    Customer& operator=(Customer& otherCustomer);
    Customer(const Customer& source);

    ~Customer(); //destructor

    //Getters and Setters
    void setCustomerID(int customerID);
    void setTitle(string title);
    void setName(string name);
    void setNumOfPurchases(int numOfPurchases);
    void setPurchases(int purchase1, int purchase2, int purchase3);
    void setType(string type);

    int getCustomerID();
    string getTitle();
    string getName();
    int getNumOfPurchases();
    int* getPurchases();
    string getType();

    void printCustomer() {
        cout << customerID << "," << title << "," << name << "," << numOfPurchases << "," << purchases << "," << type << endl;
    }

    friend std::ostream& operator<<(std::ostream& out, Customer& customer); // overloaded operator<<
    friend istream& operator>> (istream& in, Customer& customer); // overloaded operator >>
};

下面 Customer.cpp 文件中的代码

//default constructor
Customer::Customer() {

}

//Full constructor
Customer::Customer(int customerID, string title, string name, int numOfPurchases, int purchase1, int purchase2, int purchase3, string type) 
{
    customerID = customerID;
    title = title;
    name = name;
    numOfPurchases = numOfPurchases;
    purchases = new int[3];
    purchases[0] = purchase1;
    purchases[1] = purchase2;
    purchases[2] = purchase3;
    type = type;
}

Customer::Customer(const Customer& source) //copy constructor
{
    cout << "copy constructor called" << endl;
    this->customerID = source.customerID;
    this->title = source.title;
    this->name = source.name;
    this->numOfPurchases = source.numOfPurchases;
    this->purchases = new int[3];
    purchases[0] = source.purchases[0];
    purchases[1] = source.purchases[1];
    purchases[2] = source.purchases[2];
    this->type = source.type;
}

//overloaded assignment operator=
Customer& Customer::operator= (Customer& otherCustomer)
{
    cout << "Overloaded assignment operator= called" << endl;

    //self-assignment guard
    if (this == &otherCustomer)
        return *this;  //refernce to the same object

   // copy data from the source (rhs) to this object (the destination)
    name = otherCustomer.name;

    //must make a new scores object to store a copy of the other student 
    if (purchases != nullptr)
        delete[] purchases;

    purchases = new int[3];
    for (int i = 0; i < 3; i++) {
        purchases[i] = otherCustomer.purchases[i];
    }

    //return this existing object so we can chain this operator 
    return *this;
}
Customer::~Customer() {
    cout << "Destructor ~Customer called" << endl;
    delete[] purchases;
}

// Overloaded insertion operator  (Outputs Character object data as an output stream)
// Defined in header file as a  "friend" function, as it is not a member function
//
ostream& operator<<(ostream& out, Customer& customer)
{
    cout << "Customer details ( output by insertion operator<< )" << endl;
    cout << "Customer ID: " << customer.customerID << endl;
    cout << "Title: " << customer.title << endl;
    cout << "Name: " << customer.name << endl;
    cout << "Number of purchases: " << customer.numOfPurchases << endl;
    cout << "Purchases: ";
    for (int i = 0; i < 3; i++)
    {
        if (i > 0) cout << ",";
        cout << customer.purchases[i];
    }
    cout << "Type: " << customer.type << endl;
    
    return out;
}


istream& operator>> (istream& in, Customer& customer)
{
    cout << "Enter Customer details ( using the extraction operator>> )" << endl;
    cout << "Enter Customer ID: " << endl;
    cin >> customer.customerID;
    cout << "Enter Title: " << endl;
    getline(cin, customer.title);
    cout << "Enter Name: " << endl;
    getline(cin, customer.name);
    cout << "Enter Number of Purchases: ";
    cin >> customer.numOfPurchases; 
    cout << "Enter Purchases: ";
    cin >> customer.purchases[0];
    cin >> customer.purchases[1];
    cin >> customer.purchases[2];
    cout << "Enter Type";
    getline(cin, customer.type);
    cout << endl;

    return in;
}

int Customer::getCustomerID()
{
    return customerID;
}

string Customer::getTitle()
{
    return title;
}

string Customer::getName()
{
    return name;
}

int Customer::getNumOfPurchases()
{
    return numOfPurchases;
}

int* Customer::getPurchases()
{
    return purchases;
}

string Customer::getType()
{
    return type;
}

void Customer::setCustomerID(int customerID)
{
    if (customerID < 1) {
        throw invalid_argument("Customer ID has to be equal to 1 or more");
    }
    this->customerID = customerID;
}

void Customer::setTitle(string title)
{
    if (title.length() < 2) {
        throw invalid_argument("Title has to be more than or equal to 2 characters");
    }
    this->title = title;
}

void Customer::setName(string name)
{
    if (name.length() < 4) {
        throw invalid_argument("Length of name should be more than or equal to 4 characters");
    }
    this->name = name;
}

void Customer::setNumOfPurchases(int numOfPurchases)
{
    if(numOfPurchases > 0 && numOfPurchases < 10000){
        throw invalid_argument("Number of purchases should be between 0 to 10000");
    }
    this->numOfPurchases = numOfPurchases;
}

void Customer::setPurchases(int purchase1, int purchase2, int purchase3)
{
    if (purchase1 < 0 || purchase2 < 0 || purchase3 < 0) {
        throw invalid_argument("Purchases must be more than or equal to zero");
    }
}

void Customer::setType(string type) {
    if (type != "New" || type != "Either") {
        throw invalid_argument("Type of purchase has to be New or Either");
    }
}

Answer 1

您遗漏了一些指令（命名空间 std、iostream 等），但我修复了它并将问题重现到这里：

libc++abi.dylib: terminating with uncaught exception of type std::invalid_argument: Number of purchases should be between 0 to 10000 Abort trap: 6

使用您提供的 Customer.cpp 代码（感谢您添加），我发现第 161 行存在逻辑错误

void Customer::setNumOfPurchases(int numOfPurchases)
{
    if(numOfPurchases > 0 && numOfPurchases < 10000){
        throw invalid_argument("Number of purchases should be between 0 to 10000");
    }
    this->numOfPurchases = numOfPurchases;
}

很明显，如果 numOfPurchases 介于 0 和 1000 之间，则会抛出 invalid_argument 错误，这是您的设计使然。你应该把它改成这样：

void Customer::setNumOfPurchases(int numOfPurchases)
{
    if(numOfPurchases < 0 || numOfPurchases > 10000){
        throw invalid_argument("Number of purchases should be between 0 to 10000");
    }
    this->numOfPurchases = numOfPurchases;
}

修复了另一个错误：

libc++abi.dylib: terminating with uncaught exception of type std::invalid_argument: Type of purchase has to be New or Either Abort trap: 6

这将我带到了第 176 行：

void Customer::setType(string type) {
    if (type != "New" || type != "Either") {
        throw invalid_argument("Type of purchase has to be New or Either");
    }
}

啊，经典的字符串比较问题。这是 NOT 在 C++ 中比较字符串的方式。请尝试使用字符串库中的 compare 方法。

void Customer::setType(string type) {
    if (type.compare("New") != 0 && type.compare("Either") != 0) {
        throw invalid_argument("Type of purchase has to be New or Either");
    }
}

这些更改为我解决了问题并且运行良好。另外，我问了你使用的编译命令，似乎没有提供，所以我只使用 g++ main.cpp.

当我尝试在 C++ 中编译和 运行 我的 "main.cpp" 文件时，是什么导致调用 abort 方法？

What is causing the abort method to be called when I try to compile and run my "main.cpp" file in c++?

c++

main

abort

当我尝试在 C++ 中编译和运行我的 "main.cpp" 文件时，是什么导致调用 abort 方法？