Xếp loai hoc lực (bt)

#include<stdio.h>
#include<conio.h>
void main ()
{
float diem;
printf("\nNhap so diem cua hs vao:");
scanf("%f",&diem);
if (diem<5) printf("\nXep loai hoc luc la Yeu");
else
if (5<diem && diem<=6.5) printf("\nXep loai hoc luc la Trung Binh");
else if (6.5 < diem && diem <= 8 ) printf("\nXep loai hoc luc la Kha");
else if (diem> 8 ) printf("\nXep loai hoc luc la Gioi");
getch();
}