改错3-38

#include<iostream.h>
class time
{
private:
int hour,minute,second;
public:
void settime(int h,int m,int s)
    {
        hour=(h>=0&&h<24)?h:0;
        minute=(m>=0&&m<60)?m:0;
        second=(s>=0&&s<60)?s:0;
    }
void showtime()
    {cout<<hour<<':'<<minute<<':'<<second<<endl;}
}
void main()
{
    time t1;
    t1.settime(14,52,66);
    cout<<"The time is:";
    t1.showtime();
return;
}

 改后

#include<iostream.h>
class time
{
private:
int hour,minute,second;
public:
void settime(int h,int m,int s)
    {
        hour=(h>=0&&h<24)?h:0;
        minute=(m>=0&&m<60)?m:0;
        second=(s>=0&&s<60)?s:0;
    }
void showtime()
    {
        cout<<hour<<':'<<minute<<':'<<second<<endl;
    }
};//加分号;
void main()
{
    time t1;
    t1.settime(14,52,66);
    cout<<"The time is:";
    t1.showtime();
}

 改为外联函数:

#include<iostream.h>
class time
{
private:
int hour,minute,second;
public:
void settime(int,int,int);
void showtime();
};
void time::settime(int h,int m,int s)
    {
        hour=(h>=0&&h<24)?h:0;
        minute=(m>=0&&m<60)?m:0;
        second=(s>=0&&s<60)?s:0;
    }
void time::showtime()
    {
        cout<<hour<<':'<<minute<<':'<<second<<endl;
    }
void main()
{
    time t1;
    t1.settime(14,52,66);
    cout<<"The time is:";
    t1.showtime();
}