prepare (1/3): 
finished

make (2/3): 
g++ -g -Wall -I. -O2 -std=c++11  -o main.o -c main.cpp
In file included from main.cpp:6:0:
graph.h: In member function 'bool Graph::whetherDAG()':
graph.h:184:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     return Order->size() == nodeNumbers;
            ~~~~~~~~~~~~~~^~~~~~~~~~~~~~
graph.h: In member function 'bool Graph::whetherMSTExist()':
graph.h:225:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     return edgeSetMST->size() == (nodeNumbers - 1);
            ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~
g++ -g -Wall -I. -O2 -std=c++11  -o main main.o
finished

clean (3/3): 
finished

all task finished, build successfully