java - 计算并返回 FizzBu​​zzProblem 中 3*f+5*b-15*fb 的值

Question

Given: A number is considered fizz if it is divisible by 3. It is considered buzz if it is divisible by 5. It is considered fizzbuzz if it is divisible by both 3 and 5. A fizzbuzz is neither fizz nor buzz. Given two numbers n1 and n2 such that n2>n1, let f be the number of fizz, b be the number of buzz and fb be the number of fizzbuzz between n1 and n2(both n1 and n2 are included).

Calculate and return the value of 3*f+5*b-15*fb?

我的方法:

我使用了问题中给出的所有条件，但我很困惑如何使用这个条件“嘶嘶声既不是嘶嘶声也不是嗡嗡声”

我得到错误的输出可能是因为这个，任何人都可以指导我如何解决这个问题。

public int calcFB (int n1, int n2) 
{
    int f=0;
    int b=0;
    int fb=0;
  for(int i=n1;i<=n2;i++)
  {
     if((i%3==0)&&(i%5==0))
     {
       fb++;
     }
     else if(i%3==0)
     {
        f++;
     }
     else if(i%5==0)
     {
        b++;
     }


  }
   return 3*f+5*b+15*fb;

}

对于输入:

 Parameters      Actual Output  Expected Output
'1' '21'         56             18

Answer 1

在您的返回声明中，您添加了 15*fb，在问题描述中，您说公式为 3*f+5*b-15*fb。所以你需要用这个 return 语句减去 15*fb:

return 3*f+5*b-15*fb