Compilare: user.cpp: In function ‘int main()’: user.cpp:16:28: warning: NULL used in arithmetic [-Wpointer-arith] for(i = 0; n[i] != NULL; i++) ^ user.cpp:44:32: warning: NULL used in arithmetic [-Wpointer-arith] for(i = 0; n[i] != NULL; i++) ^ user.cpp:89:14: warning: array subscript is below array bounds [-Warray-bounds] f=m[k]; ^ user.cpp:107:21: warning: ‘o’ may be used uninitialized in this function [-Wmaybe-uninitialized] o*=3; ^