Seems a lot more work than:
Code:
void go4e_15847()
{
  uint noOfOverFlow=0,reqSum=0,i,hr[3],min[3],minuteSum=0;
   for(i=0;i<3;++i)
   {
     cout<<"Enter "<<i<< " Hour"<<endl;;
     cin>>hr[i];
     cout<<"Enter "<<i<< " minutes"<<endl;
     cin>>min[i];
   }
  minuteSum=min[0]+min[1]+min[2]+(hr[0]+hr[1]+hr[2])*60;
  cout<<"Finally sum is "<<(minuteSum/60)<<"h "<<(minuteSum%60)<<"min"<<endl;
}