public static void main(String[] args) {
// 1.接受控制台输入
System.out.println("---计算器程序---");
System.out.println("输入第一个操作数");
Scanner scanner = new Scanner(System.in);
String strNum1 = scanner.nextLine();
System.out.println("输入运算符");
String oper = scanner.nextLine();
System.out.println("输入第二个操作数");
String strNum2 = scanner.nextLine();
double result = 0;
double num1 = Double.parseDouble(strNum1);
double num2 = Double.parseDouble(strNum2);
// 2.进行运算
if ("+".equals(oper)) {
OperationFactory factory = new AddOperationFactory();
Operation operation = factory.getOperation();
operation.setNum1(num1);
operation.setNum2(num2);
result = operation.getResult();
}
// 3.返回结果
System.out.println(strNum1 + oper + strNum2 + "=" + result);
}
