Compilare: main.cpp: In function 'int main()': main.cpp:8:9: warning: unused variable 'n' [-Wunused-variable] int n,i,j; ^ main.cpp:8:11: warning: unused variable 'i' [-Wunused-variable] int n,i,j; ^ main.cpp:8:13: warning: unused variable 'j' [-Wunused-variable] int n,i,j; ^