Compilare: user.c: In function ‘print_values’: user.c:17:10: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%c", &c); ^ user.c:19:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%c", &c); ^ user.c:24:12: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%c", &c); ^ user.c:29:10: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(&c, 1, sizeof(char), fin); ^ user.c:32:12: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%c", &c); ^ user.c: In function ‘read’: user.c:49:8: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%c", &c); ^ user.c:51:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%c", &c); ^ user.c:54:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%c", &c); ^ user.c:56:9: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(&c, 1, sizeof(char), fin); ^ user.c:59:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%c", &c); ^ user.c:63:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%c", &c); ^