從內存中打印奇怪的數字

Question

我有一個包含藥物的列表（動態矢量），我想從列表中打印所有藥物，但它從內存中打印一些數字。例如：

Give the medicine's ID: 1 
Give the medicine's name:alg 
Give the medicine's concentration: 30 
Give the medicine's quantity: 40 

打印：

The medicine's ID is: 4215400 
The medicine's name is: 
The medicine's concentration is: 3.47235e+230 
The medicine's quantity is: 2686544 

這些都是打印功能：

void Console::printMedicine(Medicine* m){ 
     int ID = m->getID(); 
     string name = m->getName(); 
     double concentration = m->getConcentration(); 
     int quantity = m->getQuantity(); 
     cout<<"\nThe medicine's ID is: "<<ID<<"\n"; 
     cout<<"The medicine's name is: "<<name<<"\n"; 
     cout<<"The medicine's concentration is: "<<concentration<<"\n"; 
     cout<<"The medicine's quantity is: "<<quantity<<"\n"; 
    } 

    void Console::printAllMedicines(){ 
     DynamicVector<Medicine*>* medList = ctrl->getAllMeds(); 
     for(int i=0; i < medList->getLen(); i++){ 
      Medicine* m = medList->getElementAtPosition(i); 
      printMedicine(m); 
     } 
    } 

這是getElementAtPosition功能：

template <typename Element> 
Element DynamicVector<Element>::getElementAtPosition(int pos){ 
    return this->elems[pos]; 
} 

這是醫藥類，只有私人部分：

class Medicine{ 
private: 
    int ID, quantity; 
    double concentration; 
    string name; 

，這是medList的倉庫聲明：

class Repository{ 
    public: 
     DynamicVector<Medicine*>* medList; 

構造函數和getter在醫藥類：

Medicine::Medicine(){ //implicit constructor 
     this->ID=0; 
     this->concentration=0; 
     this->name=""; 
     this->quantity=0; 
    } 

    Medicine::Medicine(int ID, string name, double concentration, int quantity){ //constructor with parameters 
     this->ID=ID; 
     this->name=name; 
     this->concentration=concentration; 
     this->quantity=quantity; 


int Medicine::getID(){ 
    return this->ID; 
} 

string Medicine::getName(){ 
    return this->name; 
} 

double Medicine::getConcentration(){ 
    return this->concentration; 
} 

int Medicine::getQuantity(){ 
    return this->quantity; 

     } 

的getAllMeds和GETALL功能：

DynamicVector<Medicine*>* Controller::getAllMeds(){ 
    return repo->getAll(); 
} 

DynamicVector<Medicine*>* Repository::getAll(){ 
    return medList; 
} 

我嘗試了幾個小時來解決這個問題，但我不明白問題在哪裏。我究竟做錯了什麼？

Answer 1

我假設你的Medicine實例是由getAllMeds（）創建的。你確定你傳遞好的值到你的構造函數中嗎？你看到的這些值看起來像是未初始化的內存。他們每次都是相同的奇怪值，還是他們改變了？