Compilare: user.cpp: In function ‘int main()’: user.cpp:89:6: warning: unused variable ‘i’ [-Wunused-variable] int i,j,s,x; ^ user.cpp:89:8: warning: unused variable ‘j’ [-Wunused-variable] int i,j,s,x; ^ user.cpp:89:12: warning: unused variable ‘x’ [-Wunused-variable] int i,j,s,x; ^ user.cpp:90:16: warning: unused variable ‘c1’ [-Wunused-variable] unsigned char c1,c2,c3; ^ user.cpp:90:19: warning: unused variable ‘c2’ [-Wunused-variable] unsigned char c1,c2,c3; ^ user.cpp:90:22: warning: unused variable ‘c3’ [-Wunused-variable] unsigned char c1,c2,c3; ^