编译器报错提示 此声明没有存储类或类型说明符
或 xx does not name a type
个人原因
因为我在头文件中运行了如下语句
struct EXAMPLE examples;
examples.input = "hello world"
但是 函数外只能定义全局变量或者对象 ,而不能执行语句及调用函数 。
可以改为
struct EXAMPLE examples = {.input = "hello world"};
但是注意C语言中结构体初始化时,对于内部元素的顺序没有要求,但是C++不一样。
因为C++结构体初始化时,必须按照定义的顺序进行初始化,不能够跳过其中内容而初始化其他选项,或者定义的顺序先后有问题。
否则会报错:sorry, unimplemented: non-trivial designated initializers not supported
c++最好这么写
struct EXAMPLE examples = {"hello world"};
原因2
i just had this problem, and like Arckaroph have said : the problem is that when we include
a header file in a source code file, and we use in it the directive #ifndef, we can't include
it again in a header file to give a type of it's included class to a variable in source code file
example :
class1.h contains Class1 class2.h contains Class2 class2 have a private variable V with
class1 type if we include class1.h in class2.CPP we can't include it in class2.h to give V a class1 type.
so we put in class2.cpp class2.h before class1.h or we delete class1.h from class2.cpp
原文链接: https://www.cnblogs.com/friedCoder/p/12239966.html
欢迎关注
微信关注下方公众号,第一时间获取干货硬货;公众号内回复【pdf】免费获取数百本计算机经典书籍;
也有高质量的技术群,里面有嵌入式、搜广推等BAT大佬
原创文章受到原创版权保护。转载请注明出处:https://www.ccppcoding.com/archives/325767
非原创文章文中已经注明原地址,如有侵权,联系删除
关注公众号【高性能架构探索】,第一时间获取最新文章
转载文章受原作者版权保护。转载请注明原作者出处!