import java.text.DecimalFormat;
import java.util.Scanner;
public class Zhidao {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
try {
System.out.print("请输入第一个数:");
double x = scanner.nextDouble();
System.out.print("请输入第二个数:");
double y = scanner.nextDouble();
System.out.print("请输入运算符:");
String s = scanner.next();
char z = s.charAt(0);
js.yunsuan(x, y, z);
} catch (Exception e) {
System.out.println("请输入正确的数据!");
}
}
}
import java.text.DecimalFormat;
public class js {
public static void yunsuan(double x, double y, Character z) {
DecimalFormat r = new DecimalFormat();
r.applyPattern("#0.00");
if (z.equals('+')) {
System.out.println(x + "+" + y + "=" + r.format((x + y)));
} else if (z.equals('-')) {
System.out.println(x + "-" + y + "=" + r.format((x - y)));
} else if (z.equals('*')) {
System.out.println(x + "*" + y + "=" + r.format((x * y)));
} else if (z.equals('/')) {
if (y == 0) {
System.out.println("被除数不能为0");
} else {
System.out.println(x + "/" + y + "=" + r.format((x / y)));
}
} else {
System.out.println("无法识别改运算符");
}
}
}
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