Compilare: main.cpp: In function 'int main()': main.cpp:20:12: warning: converting to non-pointer type 'char' from NULL [-Wconversion-null] aux[n] = NULL; ^~~~ main.cpp:8:6: warning: unused variable 'i' [-Wunused-variable] int i, j, l, nrcir, maxi; ^ main.cpp:8:9: warning: unused variable 'j' [-Wunused-variable] int i, j, l, nrcir, maxi; ^ main.cpp:8:12: warning: variable 'l' set but not used [-Wunused-but-set-variable] int i, j, l, nrcir, maxi; ^ main.cpp:8:22: warning: unused variable 'maxi' [-Wunused-variable] int i, j, l, nrcir, maxi; ^~~~ main.cpp:27:10: warning: 'nrcir' may be used uninitialized in this function [-Wmaybe-uninitialized] g<<nrcir; ^