int main(void)

{

Floating a;

scanf("%f "，& ampa)；

a =(int)(a * 1000+0.5)/ 1000.0；

printf ("%0.3f "，a)；

Returns 0;

}

Extended data:

Other methods to achieve rounding:

int myround(double indata，int precision，double * outdata)

{?

long pre = 1，I；

for(I = 0； I< accuracy; i++)pre = pre * 10；

if(cy_FloatCompare(indata，0.00)>0)

* out data =(int)((in data * pre)+0.5)/ 100.00；

Or what?

* out data =(int)((in data * pre)-0.5)/ 100.00；

Returns 0;

}?

// cy_FloatCompare is a function that compares floating-point numbers with 0, assuming it exists. The return value is the same as strcmp.