Compilare: user.c: In function ‘main’: user.c:26:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &T); ^ user.c:29:23: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d %d", &N, &K); ^ In file included from /usr/include/string.h:642:0, from user.c:2: In function ‘memset’, inlined from ‘main’ at user.c:28:23: /usr/include/i386-linux-gnu/bits/string3.h:82:30: warning: call to ‘__warn_memset_zero_len’ declared with attribute warning: memset used with constant zero length parameter; this could be due to transposed parameters [enabled by default] __warn_memset_zero_len (); ^ /tmp/cca47Tfb.o: In function `main': user.c:(.text.startup+0x61): warning: memset used with constant zero length parameter; this could be due to transposed parameters