Compilare: user.cpp: In function ‘int main()’: user.cpp:21:15: warning: unused variable ‘j’ [-Wunused-variable] int n, i, j, mini, maxi, pas, x, y, d; ^ user.cpp:21:35: warning: unused variable ‘x’ [-Wunused-variable] int n, i, j, mini, maxi, pas, x, y, d; ^ user.cpp:21:38: warning: unused variable ‘y’ [-Wunused-variable] int n, i, j, mini, maxi, pas, x, y, d; ^ user.cpp:21:41: warning: unused variable ‘d’ [-Wunused-variable] int n, i, j, mini, maxi, pas, x, y, d; ^ user.cpp:18:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("criza.in","r",stdin); ^ user.cpp:19:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("criza.out","w",stdout); ^ user.cpp:25:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:27:41: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&dist[ i ],&v[ i ]); ^