Compilare: user.cpp: In function ‘int subsir(char*, char*)’: user.cpp:12:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < strlen(x); j++){ ^ user.cpp:18:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(k == strlen(y)){ ^ user.cpp: In function ‘int main()’: user.cpp:39:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(strlen(S[i]) > lmax){ ^ user.cpp:43:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] }else if((strlen(S[i]) == lmax)){ ^ user.cpp:36:9: warning: variable ‘imax’ set but not used [-Wunused-but-set-variable] int imax, lmax = 0; ^