Compilare: user.cpp: In function ‘int main()’: user.cpp:52:14: warning: unused variable ‘q’ [-Wunused-variable] long n,k,q,x1,y1,z1,j,s=0,i; ^ user.cpp: In function ‘void qs(long int, long int)’: user.cpp:27:22: warning: ‘ma’ may be used uninitialized in this function [-Wmaybe-uninitialized] piv=x+y+z-mi-ma; ^ user.cpp:27:16: warning: ‘mi’ may be used uninitialized in this function [-Wmaybe-uninitialized] piv=x+y+z-mi-ma; ^