Compilare: user.cpp: In function ‘int main()’: user.cpp:8:13: warning: unused variable ‘n’ [-Wunused-variable] int t,i,n,ct=0,r4,j,uc,a1,a2;f>>t;char c1,c2,c3; ^ user.cpp:8:20: warning: unused variable ‘r4’ [-Wunused-variable] int t,i,n,ct=0,r4,j,uc,a1,a2;f>>t;char c1,c2,c3; ^ user.cpp:8:23: warning: unused variable ‘j’ [-Wunused-variable] int t,i,n,ct=0,r4,j,uc,a1,a2;f>>t;char c1,c2,c3; ^ user.cpp:8:25: warning: unused variable ‘uc’ [-Wunused-variable] int t,i,n,ct=0,r4,j,uc,a1,a2;f>>t;char c1,c2,c3; ^