使用变量声明对象的名称

Question

所以我试图从用户获取输入，然后将我的类客户的对象命名为与来自用户的输入相同。当我这样做，我得到了错误

"main.cpp: In function ‘void getinfo(String)’: main.cpp:34:13: error: declaration of ‘customer x’ shadows a parameter customer x(firstname, lastname, account, pinnum, balance, accthist);

我需要一种方法来自动定制类的名称，可以由指定变量，它可以被修改或由用户输入。

*****更新****** 我确实想要很简单。这是一个学校项目，目的是由两个或三个人进行，我现在正在独奏。以下是该作业的链接。我将其包括在内，以防有人可能有更好的方式使用我的代码，或者解决我正在解决的问题的更好方法。

assignemnt

void getinfo(string x){ 
//----------Variable Declarations-------------- 

    string firstname; 
    string lastname; 
    string account; 
    int pinnum; 
    double balance; 
    vector <int> accthist; 


//----------Get Last Name---------------------------- 
    cout<<"Please enter your last name\n"; 
    cin>>lastname; 
//----------Get First Name---------------------------- 
    cout<<"Please enter your first name\n"; 
    cin>>firstname; 
//----------Get Account Number---------------------------- 
    cout<<"Please enter your desired account number\n"; 
    cin>>account; 
//----------Get Pin Number---------------------------- 
    cout<<"Please enter your desired pin number\n"; 
    cin>>pinnum; 
//----------Get First Deposit of $1,000.00-------------- 
    cout<<"Please enter your desired balance\n"; 
    cin>>balance; 

//----------create customer---------------------------- 
    customer x(firstname, lastname, account, pinnum, balance, accthist); 
} 



int main(){ 
    int choice; 
    cout<<"\t\t Please enter the number corresponding to your selected action.\n\n"; 
    cout<<"1) Open a New Account (Minimum $1,000.00 Deposit)\t"<<"2) Close an Existing Account\n"; 
    cout<<"3) Make a Withdraw ($50.00 -$500.00)\t\t\t"<<"4) Make a Deposit\n"; 
    cout<<"5)Check Account Balance\t\t\t\t\t"<<"6) Bank Statistics Menu\n"; 
    cin>>choice; 

    if (choice == 1){ 
     string test; 
     cout<<"Please enter your first name"; 
     cin>>test; 
     getinfo(test); 

    } 
    /*if (choice == 2){ 

    } 
    if (choice == 3){ 

    } 
    if (choice == 4){ 

    } 
    if (choice == 5){ 

    } 
    if (choice == 6){ 

    } 
    */else cout<<"Oops!"; 
return 0; 
} 

HEADER FILE- functions.h

#include "std_lib_facilities_4.h" 

//--------------------------------------------------------------------- 
class customer{ 
    private: 
     string firstn; 
     string lastn; 
     string acct; 
     int pin; 
     double bal; 
     vector <int> lastten; 

    public: 
    customer(string t1,string t2,string t3, int t4, double t5, vector <int> t6); 
    void deposit(double n){}; 
    void withdraw (double n){}; 
    double get_bal(){}; 

}; 
//--------------------------------------------------------------------- 
class stats{ 
    double avg_bal();  //average balance 
    double total_deposits();  //sum of all account balances 
    int total_cust(); //total number of customers 
}; 
//--------------------------------------------------------------------- 
class bank{ 
    private: 
     vector <string> allcust; 

    public: 
     void display_cust_account(); 
     bool verify_cust(); 
     void create_new_acct(string temp); 
     void check_maintenance_fee(); 
     void read_cust_accounts_from_file(); 
     void save_cust_account_to_file(); 
     void make_backup_file(); 
     void print_stats(); 
}; 

Answer 1

"main.cpp: In function ‘void getinfo(String)’: main.cpp:34:13: error: declaration of ‘customer x’ shadows a parameter customer x(firstname, lastname, account, pinnum, balance, accthist);

无论你想达到这个代码

（我严重怀疑它使任何意义上固定之后简单的错误） ，这是非常明显的错误消息说：

customer x(firstname, lastname, account, pinnum, balance, accthist); 
     //^

从上面的行中的变量名x相同用于函数的参数

void getinfo(string x){ 
       //^

这就是阴影其实就是在这种背景下。

---

因此，要解决这个问题，你选择一个不同的名称为其中任意一个，像

customer y(firstname, lastname, account, pinnum, balance, accthist); 
     //^

或

void getinfo(string y){ 
       //^

Answer 2

我建议你将你的getInfo功能的方法里面你customer班。

class Customer 
{ 
    string firstname; 
    string lastname; 
    string account; 
    int pinnum; 
    double balance; 
    vector <int> accthist; 
    public: 
    void getInfo(void); 
}; 

void Customer::getInfo() 
{ 
//----------Get Last Name---------------------------- 
    cout<<"Please enter your last name\n"; 
    cin>>lastname; 
//----------Get First Name---------------------------- 
    cout<<"Please enter your first name\n"; 
    cin>>firstname; 
//----------Get Account Number---------------------------- 
    cout<<"Please enter your desired account number\n"; 
    cin>>account; 
//----------Get Pin Number---------------------------- 
    cout<<"Please enter your desired pin number\n"; 
    cin>>pinnum; 
//----------Get First Deposit of $1,000.00-------------- 
    cout<<"Please enter your desired balance\n"; 
    cin>>balance; 
} 

int main(void) 
{ 
    Customer person; 

    // Print prompt and get the customer information. 
    person.getInfo(); 

    //... 
    return EXIT_SUCCESS; 
}