Compilare: user.c: In function ‘main’: user.c:9:8: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("perle.in","r",stdin); ^ user.c:10:8: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("perle.out","w",stdout); ^ user.c:11:6: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&t); ^ user.c:14:13: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&l); ^ user.c:16:17: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] {scanf("%d",&v); ^ user.c:27:25: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v); ^