Compilare: user.cpp: In function ‘int main()’: user.cpp:14:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=1; i<=t;i++) ^ user.cpp:20:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=1; j<=n; j++) ^ user.cpp:7:16: warning: unused variable ‘j’ [-Wunused-variable] unsigned int t,j,n,rez, ci, ca, sa; ^ user.cpp:7:20: warning: unused variable ‘rez’ [-Wunused-variable] unsigned int t,j,n,rez, ci, ca, sa; ^