Compilare: user.c: In function ‘main’: user.c:43:5: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &tests); ^~~~~~~~~~~~~~~~~~~~~~~~~ user.c:47:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &n, &step); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ user.c:50:13: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &vec[j]); ^~~~~~~~~~~~~~~~~~~~~~~~~~