Compilare: user.c: In function ‘main’: user.c:5:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("texttrim.in","r",stdin),freopen("texttrim.out","w",stdout); ^ user.c:5:45: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("texttrim.in","r",stdin),freopen("texttrim.out","w",stdout); ^ user.c:7:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d ",&b[i]); ^ user.c:8:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("\n"),gets(s),scanf("%d",&w); ^ user.c:8:21: warning: ignoring return value of ‘gets’, declared with attribute warn_unused_result [-Wunused-result] scanf("\n"),gets(s),scanf("%d",&w); ^ user.c:8:30: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("\n"),gets(s),scanf("%d",&w); ^ /tmp/ccwblYQC.o: In function `main': user.c:(.text.startup+0x9d): warning: the `gets' function is dangerous and should not be used.