?? cal.java
字號:
package koala;
/*Cal.java*/
import java.io.*;
public class Cal //客戶類
{
public static void main(String []args)
{
double opd1=0,opd2=0;
char optr='+';
try
{
try
{
BufferedReader b1=new BufferedReader(new InputStreamReader(System.in));
System.out.print("Input the first number:");
opd1=Double.parseDouble(b1.readLine());
BufferedReader b2=new BufferedReader(new InputStreamReader(System.in));
System.out.print("Input the second number:");
opd2=Double.parseDouble(b2.readLine());
}
catch(NumberFormatException e)
{
System.out.print("Warning:please input a number!");
System.out.println(e.getMessage());
return;
}
BufferedReader b3=new BufferedReader(new InputStreamReader(System.in));
System.out.println("Input the operator:");
optr=(char)(b3.read());
}
catch(IOException e)
{
System.out.println(e.getMessage());
}
try
{
System.out.println("The reasult:"+Factory.creator(opd1,opd2,optr).Calculate());
}
catch(BadOperatorException e)
{
System.out.println(e.toString());
}
catch(DivideZeroException e)
{
System.out.println(e.toString());
}
}
}
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