Compilare: main.c: In function 'main': main.c:7:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(fp, "%c", &t); ^~~~~~~~~~~~~~~~~~~~ main.c:10:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(fp, "%c", &thrash); ^~~~~~~~~~~~~~~~~~~~~~~~~ main.c:18:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(fp, "%d", &n); ^~~~~~~~~~~~~~~~~~~~ main.c:19:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(fp, "%c", &thrash); ^~~~~~~~~~~~~~~~~~~~~~~~~ main.c:23:17: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(fp, "%c", nr2); *(nr2--) -= '0'; ^~~~~~~~~~~~~~~~~~~~~ main.c:27:17: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(fp, "%c", nr1); *(nr1--)-='0'; ^~~~~~~~~~~~~~~~~~~~~