Error LNK2019: external symbols that cannot be parsed, errorlnk2019

Error LNK2019: external symbols that cannot be parsed, errorlnk2019

1. It may be the character encoding format of the source file.

2. below

Error LNK2019:

External symbols that cannot be parsed

 

This problem is easy to encounter. Now let me explain how to solve it.

 

Cause:

 

1

The declared function is not implemented.

 

Example:

 

Class

{

Public:

A ();

};

If the constructor is not implemented,

An error occurs when an object is generated.

Solution:

Implement constructor,

If

If there is nothing to write in the constructor, remove the constructor or increase the brackets.

 

Class

{

Public:

A (){}

//

You can also remove the braces.

 

 

Or

Cpp

.

 

};

 

2

,

If this function is included in

Lib

Inside,

In this case,

It is likely that no corresponding

Lib

Solution:

Vs

Series

.

Click project properties to find

Link

 

Add the corresponding

Lib

. For example, in the blue area

With this

Lib

Directory. The directory is added as shown in the second figure.

 

 

 

Or you can use

# Pragma comment (lib ,"

The Library name you need

");

To add

 

 

3

Some old intermediate files are not deleted, and the connection files are not up-to-date.

 

Solution: delete all intermediate files.

Debug release

Delete all directories,

It is generated when the project is compiled ).