1-3

 

//error C2166: 左值指定 const 对象
#include "stdafx.h"
#include "iostream"
using namespace std;
class Text{
public:
void printconst(void) const{cout<<"hello"<<endl; k=1;}
void print(void){cout<<"hello"<<endl;}
private:
int k;
};
int main(void)
{
Text a;
a.printconst();
return 0;
}

　　而静态成员可以修改：

 

#include "stdafx.h"
#include "iostream"
using namespace std;
class Text{
public:
void printconst(void) const{k=1000;cout<<k<<endl;}
void print(void){cout<<"hello"<<endl;}
private:
static int k;
};int Text::k=500;
const Text a;
int main(void)
{
a.printconst();//ok
cin.get();
return 0;
}

　　输出：1000
　　1-4

 

//error C2662: “Text::print”: 不能将“this”指针从“const Text”转换为“Text &”
#include "stdafx.h"
#include "iostream"
using namespace std;
class Text{
public:
void printconst(void) const{cout<<"hello"<<endl;print();}
void print(void){cout<<"hello"<<endl;}
private:
int k;
};
int main(void)
{
Text a;
a.printconst();
return 0;
}

　　2-1

 

//error C2662: “Text::print”: 不能将“this”指针从“const Text”转换为“Text &”
#include "stdafx.h"
#include "iostream"
using namespace std;
class Text{
public:
void printconst(void) const{cout<<"hello"<<endl;}
void print(void){cout<<"hello"<<endl;}
private:
int k;
};
const Text a;
int main(void)
{
a.printconst();//ok
a.print();//error
return 0;
}