c++ - 使用变量声明对象的名称

Question

所以我试图从用户那里获取输入，然后将我的类客户的对象命名为与用户输入相同的名称。当我这样做时，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自定义类的名称，通过可以修改的分配变量或用户输入。

***** 更新******我确实想直截了当。这是一个学校项目，打算由两三个人来完成，而我现在正在独自完成。下面是作业的链接。我将其包括在内，以防有人可能有更好的方法来使用我的代码，或者有更好的方法来解决我正在努力解决的问题。

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;
}

头文件- 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);

无论你想用这段代码实现什么(我严重怀疑它在修复那个简单的错误后是否有意义)，错误消息说的很明显:

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

上面一行中的变量名 x 与用于函数参数的变量名相同

void getinfo(string x){
                 // ^

这就是阴影在这种情况下的实际含义。

---

因此，要解决此问题，您可以为其中任何一个选择不同的名称，例如

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

或

void getinfo(string y){
                 // ^