为什么输入2以后结果是0.000000

#include<stdio.h>
#include<math.h>
int main()
{
float x,y;
scanf("%f",&x);
if(-5<x<0)y=2*x*x*x;
else if(x!=0)if(0<x<10)y=-2*sqrt(x);
else y=x-1;
printf("%f",y);
return 0;
}