Compilare: user.c: In function ‘main’: user.c:16:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%llu%*c", &t); ^ user.c:26:10: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%llu%*c", &n); ^ user.c: In function ‘ciur’: user.c:137:1: warning: control reaches end of non-void function [-Wreturn-type] } ^