Compilare: user.cpp: In function ‘int main()’: user.cpp:25:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < strlen(S); i=i+8) ^ user.cpp:30:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 1; j < strlen(sec); j++) ^ user.cpp:58:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < strlen(final); i++) ^