使用Java中的do-while循环的斐波那契序列？

Question

我正在尝试使用Java中的do-while循环来打印Fibonacci序列，无法理解。需要介于0和100之间。

我有以下代码：

int prevPrevVal = 0;
int prevVal = 1;
int currVal;
System.out.println(prevPrevVal);
System.out.println(prevVal);

do
{       
    currVal = prevVal + prevPrevVal;
    System.out.println(currVal);

    prevPrevVal = prevVal;
    prevVal = currVal;          
} while (prevVal <= 100);

Answer 1

这是一个简化的程序，通过在while循环中提供条件限制来找出斐波那契数列。希望你们对此有所了解。...!!

    int a=0;
    int b=0;
    int temp=1;
    do {    
        a=b;
        b=temp;
        temp=a+b;
        System.out.println(temp);
    }while(temp<100);

Answer 2

设法用两个变量来做到这一点，而没有打印超出范围的数字。抱歉，这很糟糕，这是我编程的第一天：）

    int x = 0;
    int y = 1;

    do
    {
        System.out.println(x);
        y = x + y;
        if (y < 100)
        {
            System.out.println(y);
        }
        x = x + y;
    } while (x < 100);

Answer 3

这应该是您的解决方案

public static void main(String[] args) {

     int prevVal = 1;
     int prevPrevVal = 0;
     int n = 0;
     do{
         int currVal = prevVal + prevPrevVal;
         prevPrevVal = prevVal;
         prevVal = currVal;
         System.out.print(currVal+" ");
         n++;
     }while(n<5);//n is the number of terms


}

Answer 4

您去这里：

int prevVal = 1;
int prevPrevVal = 0;
        do{
        int currVal = prevVal + prevPrevVal;
                    //currVal is your Fibonacc seq.
        prevPrevVal = prevVal;
        prevVal = currVal;
    }
    while(yourCondition);

Answer 5

使用do-while中的documentation循环的基本结构：

do {
    statement(s)
} while (expression);

您在“语句”部分中想要的是在每次迭代中增加（并可能输出）结果。使用do-while循环的基本斐波那契序列如下所示：

int prevVal = 1;
int prevPrevVal = 0;
int currVal;
do {
    // Add the two numbers
    currVal = prevVal + prevPrevVal;
    // "Bump" up prevPrevVal to prevVal, and prevVal to currVal
    prevPrevVal = prevVal;
    prevVal = currVal;
    // Output to the screen
    System.out.println(currval + "\n");
} while(expression);

Answer 6

由于您希望斐波那契的条款最多为100，因此只需将while (prevVal <= 100);更改为while (prevVal+prevPrevVal <= 100);

此最多可打印89。