Compilare: user.cpp: In function ‘int main()’: user.cpp:23:21: warning: unused variable ‘B’ [-Wunused-variable] int n, i, last, B, j, l, A, st, dr, aux, pitici; ^ user.cpp:23:30: warning: unused variable ‘A’ [-Wunused-variable] int n, i, last, B, j, l, A, st, dr, aux, pitici; ^ user.cpp:25:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("pitici4.in", "r", stdin); ^ user.cpp:26:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("pitici4.out", "w", stdout); ^ user.cpp:28:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &n); ^ user.cpp:30:43: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d%d", &P [i].a, &P [i].b); ^