Compilare: user.c: In function ‘read_tab’: user.c:14:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &n); ^ user.c:17:19: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", tab[i] + j); ^ user.c: In function ‘roy_floyd’: user.c:46:1: warning: control reaches end of non-void function [-Wreturn-type] } ^