Compilare: user.c: In function ‘main’: user.c:52:13: warning: variable ‘ok’ set but not used [-Wunused-but-set-variable] int ok; ^~ user.c:11:5: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &p); ^~~~~~~~~~~~~~~~~~~ user.c:12:5: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d %d", &n, &k); ^~~~~~~~~~~~~~~~~~~~~~~~~~ user.c:15:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &v[i]); ^~~~~~~~~~~~~~~~~~~~~~