Compilare: user.cpp: In function ‘void afis(long long unsigned int)’: user.cpp:22:9: warning: unused variable ‘i’ [-Wunused-variable] int i; ^ user.cpp: In function ‘void Back(int, long long unsigned int)’: user.cpp:44:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (k>m) afis(cmmmc3); ^ user.cpp:47:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=1;i<=K;i++) ^ user.cpp: In function ‘int main()’: user.cpp:68:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=1;i<=K;i++) ^ user.cpp:73:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=1;i<=K;i++) ^