求指導，謝謝package?com.zyn;
import?java.util.Scanner;
public?class?H4?{
//float?x1,x2;
Scanner?input?=?new?Scanner(System.in);
float?a=input.nextFloat();
????float?x1=a;
float?x2?=((float)(0.5*(x1+a/x1)));
{
while(x1-x2>=0.00001)
{
x1?=?x2;
x2?=((float)?(0.5*(x1+a/x1)));
}
System.out.printf("%.3f",x1);
}
}
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