Compilare: user.cpp: In function ‘int a(int)’: user.cpp:15:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (v[mid] > x) ^ user.cpp: In function ‘int b(int)’: user.cpp:29:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (v[mid] >= x) ^ user.cpp: In function ‘int main()’: user.cpp:3:21: warning: integer overflow in expression [-Woverflow] #define inf (1<<31)-1 ^ user.cpp:44:13: note: in expansion of macro ‘inf’ v[n + 1] = inf; ^ user.cpp:45:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 1; i <= n; ++i) ^ user.cpp:52:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (v[x] == y) ^