Compilare: user.c: In function ‘main’: user.c:50:11: warning: unused variable ‘s’ [-Wunused-variable] float s; ^ user.c:49:11: warning: unused variable ‘a’ [-Wunused-variable] float a; ^ user.c:51:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f1,"%d",&t); ^ user.c:53:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f1,"%d %d",&n,&r); ^