Compilare: user.c: In function ‘main’: user.c:9:25: warning: unused variable ‘i’ [-Wunused-variable] int n,nr,ok,x,nr1,r,i; ^ user.c:9:23: warning: unused variable ‘r’ [-Wunused-variable] int n,nr,ok,x,nr1,r,i; ^ user.c:9:19: warning: unused variable ‘nr1’ [-Wunused-variable] int n,nr,ok,x,nr1,r,i; ^ user.c:9:17: warning: unused variable ‘x’ [-Wunused-variable] int n,nr,ok,x,nr1,r,i; ^ user.c:9:14: warning: unused variable ‘ok’ [-Wunused-variable] int n,nr,ok,x,nr1,r,i; ^ user.c:10:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&n); ^