Compilare: user.cpp: In function ‘int main()’: user.cpp:9:21: warning: unused variable ‘j’ [-Wunused-variable] int n, m, i, w, j=1, x=1, y=0, z=0; ^ user.cpp:9:31: warning: unused variable ‘y’ [-Wunused-variable] int n, m, i, w, j=1, x=1, y=0, z=0; ^ user.cpp:9:36: warning: unused variable ‘z’ [-Wunused-variable] int n, m, i, w, j=1, x=1, y=0, z=0; ^