Compilare: user.c: In function ‘main’: user.c:16:9: warning: implicit declaration of function ‘fabs’ [-Wimplicit-function-declaration] if(fabs(h/30-m/360)<=0.001) ^ user.c:16:12: warning: incompatible implicit declaration of built-in function ‘fabs’ [enabled by default] if(fabs(h/30-m/360)<=0.001) ^ user.c:9:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%i\n",&n); ^ user.c:13:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%f %f\n",&h,&m); ^