c++ - 错误 : the program stops executing | Exit code: 255

Question

你能告诉我我哪里失败了吗？程序在执行时关闭。

之前，它可以完成执行，但没有显示我期望的结果。那是以前，现在它关闭并且没有显示结果。

例如:如果我需要discount的结果，它会在结果上显示“nan”，可能是有问题导致它没有完成执行。

现在，正如标题所说，它没有向我显示结果，而是显示退出代码:255。

但是，如果你去在线编译器，粘贴代码，执行它并按照说明操作，你会看到最后它不显示结果而是退出代码:139 Segmentation fault (core dumped)

我认为问题主要来自SalePrice()，也许我写错了，或者我缺少库，我还没有这方面的知识。

对不起，如果我没有很好地解释自己，我还在学习，这在我之前没有发生过。

感谢阅读到这里!

#include <iostream>
#include <sstream>
#include <math.h>

using namespace std;

class CarOnSale
{
private:
    string Brand;
    string Country;
    float Model;
    float ImportationCost;
public:
    //CONSTRUCTOR

    CarOnSale(string, string, float, float);

    //DESTRUCTOR

    ~CarOnSale();

    //SETTERS

    void setBrand(string);
    void setCountry(string);
    void setModel(float);
    void setImportationCost(float);

    //GETTERS

    string getBrand();
    string getCountry();
    float getModel();
    float getImportationCost();

    //ATTRIBUTES

    float Antiquity();
    float Discount();
    float Comission();
    float Taxes();
    float CompanyProfitPercentage();
    float SalePrice();
    float TotalPrice();
    string toString();

};


//CONSTRUCTOR CONSTRUCTOR CONSTRUCTOR

CarOnSale::CarOnSale(string pBrand, string pCountry, float pModel, float pImportationCost)
{
    Brand=pBrand;
    Country=pCountry;
    Model=pModel;
    ImportationCost=pImportationCost;
}
//DESTRUCTOR DESTRUCTOR DESTRUCTOR

CarOnSale::~CarOnSale()
{

}

//SETTER SETTER SETTER SETTER SETTER

void CarOnSale::setBrand(string pBrand)
{
    Brand=pBrand;
}

void CarOnSale::setCountry(string pCountry)
{
    Country=pCountry;
}

void CarOnSale::setModel(float pModel)
{
    Model=pModel;
}

void CarOnSale::setImportationCost(float pImportationCost)
{
    ImportationCost=pImportationCost;
}

//GETTER GETTER GETTER GETTER GETTER

string CarOnSale::getBrand()
{
    return(Brand);
}

string CarOnSale::getCountry()
{
    return(Country);
}

float CarOnSale::getModel()
{
    return(Model);
}

float CarOnSale::getImportationCost()
{
    return(ImportationCost);
}

//ATTRIBUTES ATTRIBUTES ATTRIBUTES ATTRIBUTES

float CarOnSale::Antiquity()
{
    float ActualYear=2019;

    return ActualYear-Model;
}

float CarOnSale::Discount()
{
    float Discount=0;

    if(Antiquity()>10)
    {
        return Discount=SalePrice()*0;
    }
    else
    {
        if(Antiquity()<10&&Antiquity()>5)
        {
            return Discount=SalePrice()*0.05;
        }
        else
        {
            if(Antiquity()<5)
            {
                return Discount=SalePrice()*0.015;
            }
        }
    }
}

float CarOnSale::Comission()
{
    float Comission=0;

    if(SalePrice()>8000000||Country=="USA"||Country=="Germany")
    {
        return Comission=ImportationCost*0.12;
    }
    else
    {
        return Comission=ImportationCost*0.06;
    }
}

float CarOnSale::Taxes()
{
    float Taxes=0;

    if(Country=="Germany")
    {
        return Taxes=SalePrice()*0.2;
    }
    else
    {
        if(Country=="Japan")
        {
            return Taxes=SalePrice()*0.3;
        }
        else
        {
            if(Country=="Italy")
            {
                return Taxes=SalePrice()*0.15;
            }
            else
            {
                if(Country=="USA")
                {
                    return Taxes=SalePrice()*0.08;
                }
            }
        }
    }
}

float CarOnSale::CompanyProfitPercentage()
{
    float CompanyProfitPercentage=0;

    return CompanyProfitPercentage=ImportationCost*0.3;
}

float CarOnSale::SalePrice()
{
    float SalePrice=0;

    return SalePrice=ImportationCost+CompanyProfitPercentage()-Comission()-Discount()-Taxes();

}

float CarOnSale::TotalPrice()
{
    float TotalPrice=0;

    return TotalPrice=ImportationCost+CompanyProfitPercentage()-Comission()-Discount()-Taxes();

}

string CarOnSale::toString()
{
    stringstream s;

    s<<"Car is "<<Antiquity()<<" years old"<<endl;
    s<<"Discount: "<<Discount()<<" percent"<<endl;
    s<<"Car's comission: "<<Comission()<<endl;
    s<<"Car taxes: "<<Taxes()<<endl;
    s<<"Company Profit Percentage: "<<CompanyProfitPercentage()<<endl;
    s<<"Price of the car: "<<SalePrice()<<endl;

    return s.str();
}

int main()
{
    //Variables
    string BrandMAIN, CountryMAIN;
    float ModelMAIN, ImportationCostMAIN;


    //Object
    CarOnSale Car(BrandMAIN, CountryMAIN, ModelMAIN, ImportationCostMAIN);


    //Actions

    cout<<"Write your car's brand: "<<endl;
    cin>>BrandMAIN;

    cout<<"Write your car's country: "<<endl;
    cin>>CountryMAIN;

    cout<<"Write your car's model (year): "<<endl;
    cin>>ModelMAIN;

    cout<<"write your car's importation cost: "<<endl;
    cin>>ImportationCostMAIN;


    //SETTERS

    Car.setBrand(BrandMAIN);
    Car.setCountry(CountryMAIN);
    Car.setModel(ModelMAIN);
    Car.setImportationCost(ImportationCostMAIN);


    //Prints

    cout<<Car.toString();



    return 0;
}

Answer 1

您遇到了导致堆栈溢出的递归条件。 Commision() 调用 SalePrice()，后者依次调用 Commision()，等等。

重构您的函数，使它们不会递归地相互调用。