当我尝试编译时出现错误,我不确定它有什么问题。这是一个使用文本文件验证用户名和密码的程序,用“;”分隔 单个文本文件中的分隔符。错误很长。
/tmp/ccgs7RYV.o:在函数'Employee::Employee()'中: main2.cpp:(.text+0xa5): 未定义引用 'Employee::authenticate(std::basic_string, std::allocator>, std::basic_string, std::allocator>)' /tmp/ccgs7RYV.o:在函数`Employee::Employee()'中: main2.cpp:(.text+0x231): 未定义引用 'Employee::authenticate(std::basic_string, std::allocator>, std::basic_string, std::allocator>)' collect2: ld 返回 1 个退出状态
#include<iostream>
#include<string>
#include <fstream>
using namespace std;
class Employee
{
public:
Employee();
bool authenticate(string, string);
};
Employee::Employee()
{
string username, password;
cout << "Username: ";
cin >> username;
cout << "Password: ";
cin >> password;
if (authenticate(username, password) == true)
cout << "Sucess" << endl;
else
cout << "fail" << endl;
}
bool authenticate(string username, string password)
{
std::ifstream file("login.txt");
std::string fusername, fpassword;
while (!file.fail())
{
std::getline(file, fusername, ';'); // use ; as delimiter
std::getline(file, fpassword); // use line end as delimiter
// remember - delimiter readed from input but not added to output
if (fusername == username && fpassword == password)
return true;
}
return false;
}
int main()
{
Employee();
return 0;
}