prepare (1/3): 
finished

make (2/3): 
g++ -g -Wall -O2 -o main.o -c main.cpp
main.cpp: In function 'void partitionning(int*, int, int, int, int)':
main.cpp:113:34: warning: left operand of comma operator has no effect [-Wunused-value]
        for (i1 = 0, j1 = n-1; i1 < n, j1 >= 0; i1++, j1--)
                               ~~~^~~
main.cpp: In function 'int main()':
main.cpp:44:15: warning: 'pivot' may be used uninitialized in this function [-Wmaybe-uninitialized]
 partitionning (a, n, i, sortingmethod, pivot);
 ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
g++ -g -Wall -O2 -o main main.o
finished

clean (3/3): 
finished

all task finished, build successfully