Compilare: main.c: In function 'main': main.c:7:14: warning: variable 'g' set but not used [-Wunused-but-set-variable] FILE *f,*g; ^ main.c:7:11: warning: variable 'f' set but not used [-Wunused-but-set-variable] FILE *f,*g; ^ main.c:10:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%hd%hd",&a,&b); ^~~~~~~~~~~~~~~~~~~~~