LNK1120:Visual Studio 2012 中 1 个未解析的外部

LNK1120: 1 unresolved externals in Visual Studio 2012

本文关键字：外部 Visual Studio 2012 LNK1120      更新时间：2023-10-16

我是C++新手，所以请耐心等待。当我编译一个时，我收到此错误。包括 cpp 和头文件。这是我收到的错误：

1>------ Build started: Project: 12_6, Configuration: Debug Win32 ------
1>MSVCRTD.lib(crtexe.obj) : error LNK2019: unresolved external symbol _main referenced in function ___tmainCRTStartup
1>C:UsersjohnDocumentsVisual Studio 2012How to programch12_612_6Debug12_6.exe : fatal error LNK1120: 1 unresolved externals
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

佣金员工.h

#ifndef COMMISSION_H
#define COMMISSION_H
#include <string> // C++ standard string class
using namespace std;
class CommissionEmployee
{
public:
   CommissionEmployee( const string &, const string &, const string &, 
      double = 0.0, double = 0.0 );
   void setFirstName( const string & ); // set first name
   string getFirstName() const; // return first name
   void setLastName( const string & ); // set last name
   string getLastName() const; // return last name
   void setSocialSecurityNumber( const string & ); // set SSN
   string getSocialSecurityNumber() const; // return SSN
   void setGrossSales( double ); // set gross sales amount
   double getGrossSales() const; // return gross sales amount
   void setCommissionRate( double ); // set commission rate (percentage)
   double getCommissionRate() const; // return commission rate
   double earnings() const; // calculate earnings
   void print() const; // print CommissionEmployee object
private:
   string firstName;
   string lastName;
   string socialSecurityNumber;
   double grossSales; // gross weekly sales
   double commissionRate; // commission percentage
}; // end class CommissionEmployee
#endif

佣金员工.cpp

您似乎没有定义主函数。程序需要有一个主函数。链接器期望这一点，如果未定义，则会导致阻塞。main 函数是程序的入口点，没有它，程序将无法启动。

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