#include
#include
using namespace std;
class Examinfo{
public:
Examinfo(string name,char grade):name(name),mode(GRADE),grade(grade){}
Examinfo(string name,bool pass):name(name),mode(PASS),pass(pass){}
Examinfo(string name,int percent):name(name),mode(PERCENTAGE),percent(percent){}
void show();
private:
string name;
enum{
GRADE,
PASS,
PERCENTAGE
}mode;
union{
char grade ;
bool pass;
int percent ;
};
};
void Examinfo::show(){
cout<<name<<":";
switch(mode){
case GRADE:cout<<grade;
break;
case PASS: cout<<(pass?"pass":"FALL");break;
case PERCENTAGE: cout<<percent;break;
}
cout<<endl;
}
int main()
{
Examinfo course1("english",'b');
Examinfo course2("calcus",true);
Examinfo course3("c++ programming",85);
course1.show();
course2.show();
course3.show();
return 0;
}
程序中的enum和union的初始化看不懂,求教,怎么会是那种形式呢?求详细解释,谢了
有一些C++的程序代码看不懂
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2条回答
- Eleven 2015-01-04 08:56关注
一个是枚举,一个是联合。
请参考:http://blog.csdn.net/lvsmaster/article/details/5839005解决 无用评论 打赏 举报