classtime

{

privateinthour,minute,second;

}

privatetimeadd(timet1,timet2)

{

inttemp;

timet3;

t3.second=t1.second+t2.second;

temp=t3.second/60;

if(temp>0)

t3.second=t3.second%60;

t3.minute=t1.minute+t2.minute+temp;

temp=t3.minute/60;

if(temp>0)

t3.minute=t3.minute%60;

t3.hour=t1.hour+t2.hour+temp;

temp=t3.hour/24;

if(temp>0)

t3.hour=t3.hour%24;

returnt3;

}

你在哪裡執行的啊?另外根據題意add僅僅是個方法，沒有在任何類裡面，或者你把方法寫進time類裡試試