Visual C 致命错误 LNK1120：1 个未解析的外部
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Visual C fatal error LNK1120: 1 unresolved externals
提问by user2035780
Don't know whats wrong, all help will be greatly appreciated. I'm thinking I am having a problem with a file source, but am not sure.
不知道出了什么问题，所有帮助将不胜感激。我想我的文件源有问题，但我不确定。
1>------ Build started: Project: Assignment 08 ADL, Configuration: Debug Win32 ------
1>Build started 3/18/2013 8:37:38 PM.
1>InitializeBuildStatus:
1> Touching "Debug\Assignment 08 ADL.unsuccessfulbuild".
1>ClCompile:
1> Assignment 08 ADL.cpp
1> Generating Code...
1> Skipping... (no relevant changes detected)
1> student.cpp
1>ManifestResourceCompile:
1> All outputs are up-to-date.
1>Assignment 08 ADL.obj : error LNK2019: unresolved external symbol "long __cdecl decimals(class std::basic_ostream<char,struct std::char_traits<char> > &,int)" (? decimals@@YAJAAV?$basic_ostream@DU?$char_traits@D@std@@@std@@H@Z) referenced in function "void __cdecl display(class student)" (?display@@YAXVstudent@@@Z)
1>J:\CO 127\Assignment 08 ADL\Debug\Assignment 08 ADL.exe : fatal error LNK1120: 1 unresolved externals
1>
1>Build FAILED.
1>
1>Time Elapsed 00:00:24.82
采纳答案by shf301
You need to look at the line above LNK1120, the LNK2019error tells you what is wrong.
您需要查看上面的行LNK1120，LNK2019错误告诉您出了什么问题。
Inside of your void display(class student)function you are calling a function named decimalsthat is not defined anywhere in your source code or in a library.
在您的void display(class student)函数内部，您正在调用一个decimals未在源代码或库中的任何位置定义的函数。
回答by Mohamed El Shenawy
This problem appeared to me when I added .c file instead of .cpp so check the name of the files as well
当我添加 .c 文件而不是 .cpp 时，这个问题出现在我身上，所以还要检查文件的名称
回答by Khan
Make sure the external variable able to access in your current file. For Testingeasy way is declare same name local variable for testing your logic working not , later change try to access external variable.
确保外部变量能够在当前文件中访问。 对于测试简单的方法是声明同名局部变量来测试你的逻辑是否正常工作，稍后更改尝试访问外部变量。
回答by Maverick
LNK 2019 error is a linker error which generally means some object is not available to the linker. Try clean rebuilding the project and then try to execute it.
LNK 2019 错误是链接器错误，这通常意味着链接器无法使用某些对象。尝试干净地重建项目，然后尝试执行它。
