Compilare: user.cpp: In function ‘int main()’: user.cpp:36:11: warning: narrowing conversion of ‘dy’ from ‘int’ to ‘double’ inside { } [-Wnarrowing] p1={0,dy};p2={dx,0};p3={0,-dy};p4={-dx,0}; ^ user.cpp:36:21: warning: narrowing conversion of ‘dx’ from ‘int’ to ‘double’ inside { } [-Wnarrowing] p1={0,dy};p2={dx,0};p3={0,-dy};p4={-dx,0}; ^ user.cpp:36:31: warning: narrowing conversion of ‘- dy’ from ‘int’ to ‘double’ inside { } [-Wnarrowing] p1={0,dy};p2={dx,0};p3={0,-dy};p4={-dx,0}; ^ user.cpp:36:42: warning: narrowing conversion of ‘- dx’ from ‘int’ to ‘double’ inside { } [-Wnarrowing] p1={0,dy};p2={dx,0};p3={0,-dy};p4={-dx,0}; ^ user.cpp:27:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("romb.in","r",stdin); ^ user.cpp:28:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("romb.out","w",stdout); ^ user.cpp:31:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&t); ^ user.cpp:34:47: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d%d",&dx,&dy,&k,&cx,&cy); ^