//////////////<br />//fileName:TestClass.h<br />////////////<br />//#pragma once<br />#ifndef THIS___<br />#define THIS___<br />#include <iostream><br />using namespace std;<br />//const int TestClass::m_con_var<br />class TestClass<br />{<br />public:<br /> TestClass();<br /> TestClass(int n);<br /> virtual ~TestClass(void);<br /> int m_ntestVar;<br /> static int m_nvar;<br /> const static int m_cnsta_var;<br /> static const int m_con_var ;<br />private:<br />public:<br /> int display(void);<br />};<br />//const int TestClass::m_con_var;<br />#endif </p> <p>//////////////<br />//fileName:TestClass.cpp<br />////////////<br />#include "TestClass.h"</p> <p>TestClass::TestClass(){<br />}<br />TestClass::TestClass(int n):m_ntestVar(n)<br />{</p> <p> cout << "m_nvar" << TestClass::m_nvar << endl;<br /> cout << "this->m_ntestVar" << this->m_ntestVar << endl;<br /> cout << "m_cnsta_var" << TestClass::m_cnsta_var << endl;</p> <p> TestClass::m_nvar++;<br />}</p> <p>TestClass::~TestClass(void)<br />{<br /> cout << TestClass::m_nvar << endl;<br />}</p> <p>// demo_static.cpp : Defines the entry point for the console application.<br />//<br />#include "TestClass.h"</p> <p>//static const int TestClass::m_con_var;<br />//int TestClass::m_nvar = 0;<br />//int TestClass::m_cnsta_var = 12;<br />//TestClass::m_ntestVar<br />//extern const int m_con_var;<br />/*int TestClass::m_con_var = 0*/;<br />int TestClass::m_nvar;<br />const int TestClass::m_cnsta_var = 0;<br />const int TestClass::m_con_var = 0;<br />int main(int argc, char * argv[])<br />{<br /> TestClass tc(10);<br /> TestClass tc1(120);<br /> TestClass tcc[100];<br /> int i = 0;<br /> while(i < 100){<br /> tcc[i] = TestClass(0);<br /> i++;<br /> }<br /> return 0;<br />}<br />

const static 和static const成员在类体中只有声明，在实现文件TestClass.cpp中也没有定义，却把定义放到了main函数所在的文件中。不解？？这个程序也一个做游戏的朋友告诉我的，还没呢理解，先放到这里。

执行结果与

C++ static、const对象声明与定义

一样：