Compilare: user.cpp: In function ‘int main()’: user.cpp:20:15: warning: unused variable ‘j’ [-Wunused-variable] int n, i, j, s, t, d, k, a, b, mi, ma; ^ user.cpp:20:18: warning: unused variable ‘s’ [-Wunused-variable] int n, i, j, s, t, d, k, a, b, mi, ma; ^ user.cpp:20:21: warning: unused variable ‘t’ [-Wunused-variable] int n, i, j, s, t, d, k, a, b, mi, ma; ^ user.cpp:20:27: warning: unused variable ‘k’ [-Wunused-variable] int n, i, j, s, t, d, k, a, b, mi, ma; ^ user.cpp:20:30: warning: unused variable ‘a’ [-Wunused-variable] int n, i, j, s, t, d, k, a, b, mi, ma; ^ user.cpp:20:33: warning: unused variable ‘b’ [-Wunused-variable] int n, i, j, s, t, d, k, a, b, mi, ma; ^ user.cpp:17:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("orase.in","r",stdin); ^ user.cpp:18:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("orase.out","w",stdout); ^ user.cpp:23:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&d,&n); ^ user.cpp:25:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&v[i].x,&v[i].y); ^