static 在C++中的不完全测试

最新推荐文章于 2025-12-04 22:20:49 发布

原创最新推荐文章于 2025-12-04 22:20:49 发布 · 1k 阅读

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文章标签：

#c++ #overloading #function #iostream #class #file

此博客给出一段C++代码示例，定义了testStatic类，包含静态成员函数、重载函数和常量成员函数。在main函数中创建类对象，调用各类函数，并通过类成员指针操作，展示了C++中函数重载和静态成员的使用。

// file testStatic.cpp
//
#include <iostream>

using namespace std ;

class testStatic
{
public:
     static void pnt()
     {
          cout << "Test: " << endl ;
     }

     void pnt(int i)
     {
          cout << "void pnt(int i): " << i << endl ;
     }

// overloading function

     void pnt(int i) const
     {
          cout << "void pnt(int i) const: " << i << endl ;
     }

   // for convienence ,data members are delcared in public field

     static const int ival ;
     void (testStatic::*pmf)(int) ;
     void (testStatic::*pmfc)(int) const ;
} ;

//delcaration is necessary
const int testStatic::ival = 9 ;

//delcaration is necessary
const int *pval = &testStatic::ival ;

//notice the type of static member function pnt
void (* pf)() = &testStatic::pnt ;

// notice the type of member function pnt
void (testStatic::*pmf)(int) = &testStatic::pnt ;

// notice the type of const member funtion pnt
void (testStatic::*pmfc)(int) const = &testStatic::pnt ;

int main(char argc ,char *argv[])
{
     testStatic ts ;
     ts.pnt() ;
     cout << "using class member pointer: " << *pval << endl ;
     cout << testStatic::ival << endl ;
     (ts.*pmf)(2) ;
     (ts.*pmfc)(2) ;
     ts.pmf = &testStatic::pnt ; //assign value again
     (ts.*pmf)(3) ;
     return 0 ;
}