Compilare: user.c: In function ‘main’: user.c:48:13: warning: format ‘%lu’ expects argument of type ‘long unsigned int *’, but argument 3 has type ‘unsigned int *’ [-Wformat=] fscanf(fi, "%lu", &a[j]); ^ user.c:61:9: warning: format ‘%lu’ expects argument of type ‘long unsigned int’, but argument 3 has type ‘unsigned int’ [-Wformat=] fprintf(fo, "%lu\n", o); ^ user.c:40:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi, "%hu", &t); ^ user.c:45:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi, "%hu", &n); ^ user.c:48:19: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi, "%lu", &a[j]); ^