1)如果将函数的实现放在cpp文件中,并且标记为inline, 那么该函数对其他编译单元不可见(类似static的效果),也就是其他cpp文件不能链接该函数库,这就是标题中出现的 … undefined reference to …:https://blog.csdn.net/GW569453350game/article/details/77934568 2) 开了优化,inline的函数被优化 nm命令还是比较简单...
static void func() { static int i; i++; } } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 参考: undefined reference to static private me - C++ Forum
foo(static_cast<int>(kConst)); I believe this is now forcing the compiler to make a temporary int, and then pass a reference to that, which it can successfully do at compile time. I was wondering if this was intentional, or am I expecting too much from gcc to be able to handle th...
# Specifies a library name, specifies whether the library is STATICor# SHARED,andprovides relative paths to the source code. You can#definemultiple libraries by adding multiple add_library() commands,# and CMake builds them for you. When you build your app, Gradle# automatically package...
c++ 静态变量报错 undefined reference to static members c++中静态变量不但要在头文件中declare,还要在实现的cpp中declare。当然也可以赋个初始值。 classfoo{int_i;public:foo(inti) : _i(i) {} };classbar{public:staticintj;staticfoo f; };intbar::j =0;foobar::f(1);...
静态成员函数 不属于任何对象,他内部不能直接修改非静态的成员 你可以把要修改的对象 当形参传入
首先,你这里main函数就打错了,其次,你这里n是static的,要初始化值 看你这些头文件引用,感觉你是...
class CSingleton { //其他成员 public: static CSingleton* GetInstance(); int age; private: CSingleton(){}; static CSingleton* m_pInstance; }; CSingleton* CSingleton::GetInstance() { if ( m_pInstance == NULL ) //判断是否第一次调用 ...
"undefined reference to strptime"之自己定义strptime函数,简单介绍strptime()函数可以依照特定时间格式将字符串转换为时间类型。简单点说可以将字符串时间转化为时间戳。这个函数包括在time.h头文件里,在Unix或者类Unix系统中,我们会常常接触到。可是到了跑Nuttx系统的
静态成员变量需要在类体外定义,类体里的只算是声明:看如下的修改:include<iostream>using namespace std;class CSingleton{ //其他成员public: static CSingleton* GetInstance(); int age; private: CSingleton(){}; static CSingleton* m_pInstance;}; CSingleton* CSingleton:...