吃的一个题，快解救一下我吧

#include <stdio.h>

int main()
{
float x,y;
printf("please input x\n");
scanf("%f",&x);
if(x < 1)
{
y = x*x;
}
else if ((x>=1)&&(x<10))
{
y = 2 * x -1;
}
else
{
y = 3 * x - 11;
}
printf("%f",y);
return 0;
}