不知道编译的那些地方错了 也不知道怎么改

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int main()
{
long int t,dd,hh,mm,ss;
cin>>t;
if(0<=t&&t<10) cout<
else if(t<60) {ss=t;
cout<
else if(t<3600)
{ss=t%60;
mm=t/60;
cout<
cout<
}
else if(t<86400)
{
hh=t/3600;
mm=(t-hh3600)/60;
ss=t-(hh3600+mm60);
cout<
cout<
}
else if(t<172800)
{
dd=t/86400;
hh=(t-dd86400)/3600;
mm=(t-86400dd-3600hh)/60;
ss=t-(86400dd+hh3600+mm*60);
cout<
cout<

   }
   else if(t<=8640000)
   {
       dd=t/86400;
       hh=(t-dd*86400)/3600;
       mm=(t-86400*dd-3600*hh)/60;
       ss=t-(86400*dd+hh*3600+mm*60);
       cout<'0');
       cout<" "<<"days"<<" "<":"<":"<

}

一个include也没写啊