a.c中main函数,function函数皆可调用money和wife。b.c用外部声明extern money,是可以输出money = 9的。但是不能extern int wife,因为在a.c 中wife 加了static,其只允许在a.c中使用。(就像好兄弟money是可以共享的,但是wife不行!) 在多文件构成的程序中,如需共享一个外部变量,除了一个声明(定义声明)外,其他...
#include<stdio.h>classPoint{public:voidinit(){}staticvoidoutput(){printf("%d\n",m_x);}private:int m_x;};voidmain(){Point pt;pt.output();} 编译出错:error C2597: illegal reference to data member ‘Point::m_x’ in a static member function 因为静态成员函数属于整个类,在类实例化对象之...
function(); return 0; } 在普通·成员函数中可以调用静态成员函数,但是在静态成员函数中不可以·调用普通成员函数, 会出现下面的错误·: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 [bsk@localhost classobject]$ g++ staticnumbers.cpp staticnumbers.cpp: In static member function‘static void ...
//“static_func.h” #include <stdio.h> static void display() { printf("This is static function in a header file.\n"); } //“funcA.c” #include "static_func.h" void funcA() { printf("This is funcA...\n"); display(); } //“funcB.c” #include "static_func.h" void fu...
void fn() { n++; cout<<n<<endl; } 编译并运行Example 2,您就会发现上述代码可以分别通过编译,但运行时出现错误。试着将 static int n; //定义静态全局变量 改为 int n; //定义全局变量 再次编译运行程序,细心体会全局变量和静态全局变量的区别。
#include<stdio.h>classPoint{public:voidinit(){}staticvoidoutput(){printf("%d\n",m_x);}private:intm_x;};voidmain(){Pointpt;pt.output();} 编译出错: error C2597:illegal reference to data member'Point::m_x'inastaticmemberfunction ...
{ //调用 static_variable_in_function 10次 for (int i = 0; i < 10; ++i) { static_variable_in_function(); } } class Student { public: /** *static数据成员声明在类内部 */ static int age_; }; int Student::age_ = 18; void TestClassStaticVariable() { std::cout << "直接通过...
build/applications/main.o: In function `main': /home/recan/win_share_workspace/rt-thread-share/rt-thread/bsp/qemu-vexpress-a9/applications/main.c:253: undefined reference to `test_func' collect2: error: ld returned 1 exit status scons: *** [rtthread.elf] Error 1 ...
#include<stdio.h>classPoint{public:voidinit(){}staticvoidoutput(){printf('%d\n',m_x);}private:intm_x;};voidmain(){Pointpt;pt.output();} 编译出错: error C2597:illegal reference to data member'Point::m_x'inastaticmemberfunction ...
staticclassCompanyEmployee{publicstaticvoidDoSomething(){/*...*/}publicstaticvoidDoSomethingElse(){/*...*/} } 常数或类型声明是隐式的static成员。 不能通过实例引用static成员。 然而,可以通过类型名称引用它。 例如,请考虑以下类: C# publicclassMyBaseC{publicstructMyStruct {publicstaticintx =100; ...