prepare (1/3): 
finished

make (2/3): 
g++ -g -Wall -O2 -o main.o -c main.cpp 
main.cpp: In function 'int deter_select(int*, int, int, int)':
main.cpp:142:10: warning: 'pivotat' may be used uninitialized in this function [-Wmaybe-uninitialized]
  pivotat = partition_inplace_deter(arry,left,right,pivotat);
  ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
main.cpp: In function 'void sort_time(int, int*, int, int)':
main.cpp:157:44: warning: 'num' may be used uninitialized in this function [-Wmaybe-uninitialized]
  cout << "The order-"<<order<<" item is "<<num <<endl;
                                            ^~~
g++ -g -Wall -O2 -o main main.o
finished

clean (3/3): 
finished

all task finished, build successfully