Compilare: user.c: In function ‘main’: user.c:119:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("romb.in","r",stdin); ^ user.c:120:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("romb.out","w",stdout); ^ user.c:122:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&t); ^ user.c:125:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lf %lf %d %lf %lf",&dx,&dy,&k,&cx,&cy); ^