c++ - undefined reference to `Account::set_balance(double)' ----这是什么意思？

Question

Account.h 文件

#ifndef ACCOUNT_H
#define ACCOUNT_H

class Account
{
private:
    //attributes
    double balance;
public:
    //methods
    void set_balance(double bal);
    double get_balance();
};

#endif

Account.cpp 文件

#include "Account.h"
void Account::set_balance(double bal){
    balance=bal;
}
double Account::get_balance(){
    return balance;
}

main.cpp 文件

#include<iostream>
#include"Account.h"

int main(){
    Account frank_account;
    frank_account.set_balance(200.00);
    double showBalance=frank_account.get_balance();
    return 0;
}

错误

C:\Users\Dell\AppData\Local\Temp\ccZOi0ua.o: In function `main':
F:/OPP/opp10/main.cpp:6: undefined reference to `Account::set_balance(double)'
F:/OPP/opp10/main.cpp:7: undefined reference to `Account::get_balance()'
collect2.exe: error: ld returned 1 exit status

Build finished with error(s).
The terminal process terminated with exit code: -1.

请解释错误信息并提供解决方案。谢谢你................................................ ..................................................... .....................

Answer 1

你是如何编译这两个文件的？此错误表明“Account.cpp”不是由您编译或链接的。试试这个：

gcc Account.cpp main.cpp