Compilare: main.c: In function 'main': main.c:7:5: warning: ignoring return value of 'fread', declared with attribute warn_unused_result [-Wunused-result] fread(&t, sizeof(char), 1, fp); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:17:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(fp, "%d", &n); ^~~~~~~~~~~~~~~~~~~~ main.c:18:9: 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'; ^~~~~~~~~~~~~~~~~~~~~~~ main.c:30:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(fp, "%c", &thrash); ^~~~~~~~~~~~~~~~~~~~~~~~~