Eroare de compilare: user.c: In function ‘check’: user.c:66:5: error: ‘d’ undeclared (first use in this function) d = X / 10; ^ user.c:66:5: note: each undeclared identifier is reported only once for each function it appears in user.c: In function ‘main’: user.c:81:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d%d%d", &A, &B, &dig, &freq ); ^