Compilare: user.cpp: In function ‘int main()’: user.cpp:32:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(strlen(S1) == L[i]) { ^ user.cpp:38:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(strlen(S2) == L[i]) { ^ user.cpp:44:13: warning: ‘l2’ may be used uninitialized in this function [-Wmaybe-uninitialized] l1 += l2; ^ user.cpp:44:13: warning: ‘l1’ may be used uninitialized in this function [-Wmaybe-uninitialized]