Compilare: user.c: In function ‘main’: user.c:43:8: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f_in,"%d ",&m); ^ user.c:44:8: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f_in,"%d\n",&n); ^ user.c:51:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f_in,"%d ",&x); ^ user.c:55:8: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f_in,"\n"); ^ user.c:58:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f_in,"%d ",&x); ^