如何用结果打印输入的用户数而不是仅显示结果?

时间:2014-09-06 02:27:45

标签: java java.util.scanner user-input println

我正在尝试打印出用户输入的数字,但我不知道(例如:当用户输入2和3时,它应该显示2 + 3 = 5而不是5单独)也如何找到平均值数字也是。 这是我的代码:

public static void main(String[] args) {
    Scanner keyboard= new Scanner (System.in);
    System.out.print("Please enter your first number: ");
    int firstnumber= keyboard.nextInt();
    System.out.print("Please enter the second number: ");
    int secondnumber= keyboard.nextInt();
    int sum= firstnumber+secondnumber;
    System.out.println(sum);
    int minus= firstnumber-secondnumber;
    System.out.println(minus);
    int multiply= firstnumber*secondnumber;
    System.out.println(multiply);
    int divide= firstnumber/secondnumber;
    System.out.println(divide);
    int moddivide= firstnumber%secondnumber;
    System.out.println(moddivide);
    **int average= sum/2;**
    System.out.println(average);

    keyboard.close();


}

}

你可以看到(明星)(明星).....(明星)(明星)它不应该是2,因为它看起来并不像一个专业人士......

2 个答案:

答案 0 :(得分:1)

您可以在此处使用格式化输出:

System.out.printf("%d + %d = %d\n",firstnumber,secondnumber,sum);//<-- prints `3 + 4 = 7`

格式:

%d, integers
%s, string
%b, boolean
%f, floating

以小数计算平均值:

double average = sum / 2.0;
System.out.printf("Avg of %d & %d = %f\n",firstnumber,secondnumber,average);

答案 1 :(得分:0)

这是您正在寻找的代码:

System.out.println(firstnumber + " + " + secondnumber + " = " + sum);

平均代码:

double average = (double) sum / 2;
System.out.println(average);