warning: its scope is only this definition or declaration, which is not what you want

warning: its scope is only this definition or declaration, which is not what you want

C语言编译出错，

出错处理是:

将声明对应的文件放在前部，以保证该声明在使用前已经被找到。

参考

http://cboard.cprogramming.com/c-programming/166621-warning-its-scope-only-definition-declaration-not-what-you-want.html

文中说道

You need to declare the struct before you can use it anywhere, it should be ok if you move the function declaration after the struct.