为什么我定义声明了add（）函数，可执行程序的时候程序提示add（）函数未定义呢？求解释，有点晕，想不出原因啊，拜托大家
#include<iostream>using namespace std;
class Time
{
private:
int hours,minutes,seconds;
public:
Time(void){};
Time(int h,int m,int s);
Time(Time &t);
~Time(){cout<<"the end"<<endl;}
void settime();
int gettime();
void add(Time&t1,Time&t2);
};
Time::Time(int h,int m,int s)
{
hours=h;minutes=m;seconds=s;
cout<<"现在的时间为："<<hours<<":"<<minutes<<":"<<seconds<<endl;
}
Time::Time(Time &t)
{
hours=t.hours;minutes=t.minutes;seconds=t.seconds;
cout<<"现在的时间为："<<hours<<":"<<minutes<<":"<<seconds<<endl;
}
void Time::settime()
{
int h,m,s;
cin>>h>>m>>s;
hours=h;
minutes=m;
seconds=s;
}
int Time::gettime()
{
cout<<"现在的时间为："<<hours<<":"<<minutes<<":"<<seconds<<endl;
return 0;
}
void Time::add(Time&t1,Time&t2)
{
Time total;
const int perminutes=60;
const int perhours=60;
total.seconds=(t1.seconds+t2.seconds)%perminutes;
total.minutes=(t1.minutes+t2.minutes+(t1.seconds+t2.seconds)/perminutes)%perhours;
total.hours=(t1.hours+t2.hours+(t1.minutes+t2.minutes+(t1.seconds+t2.seconds)/perminutes)/perhours);
cout<<"现在的时间为："<<total.hours<<":"<<total.minutes<<":"<<total.seconds<<endl;
}
int main()
{
Time a(5,5,23);
cout<<"请设置当前的时间："<<endl;
a.settime();
a.gettime();
cout<<endl<<endl;
Time b(6,4,34);
add(a,b); //error C2065: 'add' : undeclared identifier
system("pause");
return 0;
}
我知道啦，额。不好意思，没看出来额.........真是
