Compilare: user.c: In function ‘main’: user.c:13:5: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d" ,&n,&m); ^~~~~~~~~~~~~~~~~~~~~~~~~~ user.c:15:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d" ,&v1[i]); ^~~~~~~~~~~~~~~~~~~~~~~~~ user.c:17:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d" ,&v2[i]); ^~~~~~~~~~~~~~~~~~~~~~~~~