Compilare: main.cpp: In function 'int main()': main.cpp:18:9: warning: unused variable 'ii' [-Wunused-variable] int ii=0, ij=1, si=2, sj=3; ^~ main.cpp:18:15: warning: unused variable 'ij' [-Wunused-variable] int ii=0, ij=1, si=2, sj=3; ^~ main.cpp:18:21: warning: unused variable 'si' [-Wunused-variable] int ii=0, ij=1, si=2, sj=3; ^~ main.cpp:18:27: warning: unused variable 'sj' [-Wunused-variable] int ii=0, ij=1, si=2, sj=3; ^~