Compilare: user.cpp: In function ‘int main()’: user.cpp:30:20: warning: unused variable ‘j’ [-Wunused-variable] register int i,j,maxim=0,st=0,sol,x; ^ user.cpp:30:22: warning: unused variable ‘maxim’ [-Wunused-variable] register int i,j,maxim=0,st=0,sol,x; ^ user.cpp:49:11: warning: ‘sol’ may be used uninitialized in this function [-Wmaybe-uninitialized] g<<sol; ^