怎样实现这样的循环？代码如下，求指教，谢谢 - JAVA论坛

已结贴√ 问题点数：5 回复次数：6

怎样实现这样的循环？代码如下，求指教，谢谢

public double DWfromM() {
        if(t<=30)
        {
            DWGeneration += (Math.exp(workedDAreaGrowthM * t) - DWGeneration;
            t++;
        }
        else if(t<=60)
        {
            int k;
            k=60-t;
            DWGeneration += (Math.exp(workedDAreaGrowthM * t) - DWGeneration;
            t++;
        }
        else if(t<=90)
        {
            int k;
            k=t-60;
            DWGeneration += (Math.exp(workedDAreaGrowthM * t) - DWGeneration;
            t++;
        }
        else if(t<=120)
        {
            int k;
            k=120-t;
            DWGeneration +=(Math.exp(workedDAreaGrowthM * t) - DWGeneration;
            t++;
        }
        else if(t<=150)
        {
            int k;
            k=t-120;
            DWGeneration +=(Math.exp(workedDAreaGrowthM * t) - DWGeneration;
            t++;
        }
        else if(t<=180)
        {
            int k;
            k=180-t;
            DWGeneration +=(Math.exp(workedDAreaGrowthM * t) - DWGeneration;
            t++;
        }
        else if(t<=210)
        {
            int k;
            k=t-180;
            DWGeneration +=(Math.exp(workedDAreaGrowthM * t) - DWGeneration;
            t++;
        }
        else if(t<=240)
        {
            int k;
            k=240-t;
            DWGeneration += (Math.exp(workedDAreaGrowthM * t) - DWGeneration;
            t++;
        }
        else if(t<=270)
        {
            int k;
            k=t-240;
            DWGeneration +=(Math.exp(workedDAreaGrowthM * t) - DWGeneration;
            t++;
        }
        else if(t<=300)
        {
            int k;
            k=300-t;
            DWGeneration += (Math.exp(workedDAreaGrowthM * t) - DWGeneration;
            t++;
        }
        else if(t<=330)
        {
            int k;
            k=t-300;
            DWGeneration += (Math.exp(workedDAreaGrowthM * t) - DWGeneration;
            t++;
        }
        else if(t<=360)
        {
            int k;
            k=360-t;
            DWGeneration +=(Math.exp(workedDAreaGrowthM * t) - DWGeneration;
            t++;
        }
        else if(t<=390)
        {
            int k;
            k=t-360;
            DWGeneration += (Math.exp(workedDAreaGrowthM * t) - DWGeneration;
            t++;
        }
        else if(t<=420)
        {
            int k;
            k=420-t;
            DWGeneration += (Math.exp(workedDAreaGrowthM * t) - DWGeneration;
            t++;
        }
        else if(t<=450)
        {
            int k;
            k=t-420;
            DWGeneration +=(Math.exp(workedDAreaGrowthM * t) - DWGeneration;
            t++;
        }
        else if(t<=480)
        {
            int k;
            k=480-t;
            DWGeneration +=(Math.exp(workedDAreaGrowthM * t) - DWGeneration;
            t++;
        }
        else if(t<=510)
        {
            int k;
            k=t-480;
            DWGeneration +=(Math.exp(workedDAreaGrowthM * t) - DWGeneration;
            t++;
        }
        else if(t<=540)
        {
            int k;
            k=540-t;
            DWGeneration +=(Math.exp(workedDAreaGrowthM * t) - DWGeneration;
            t++;
        }
        else if(t<=570)
        {
            int k;
            k=t-540;
            DWGeneration += (Math.exp(workedDAreaGrowthM * t) - DWGeneration;
            t++;
        }
        else if(t<=600)
        {
            int k;
            k=600-t;
            DWGeneration += (Math.exp(workedDAreaGrowthM * t) - DWGeneration;
            t++;
        }
        else if(t<=630)
        {
            int k;
            k=t-600;
            DWGeneration +=(Math.exp(workedDAreaGrowthM * t) - DWGeneration;
            t++;
        }

        return DWGeneration;
    }

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第 2 楼

得分:0

公式中的t应该是k，不好意思啊

第 3 楼

得分:3

没看到循环呀？

要是问怎么改善这段代码的话，建议把完全相同的处理放到if语句外边来做

比如把int k;提到if语句之前定义，
把DWGeneration +=(Math.exp(workedDAreaGrowthM * t) - DWGeneration;和t++;放到if语句之后做

第 4 楼

得分:0

回复 3 楼日知己所无

private int t=0;
public double DWfromM() {
        if(t<=30)
        {
            int k;
            k=t;
            DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
        }
        else if(t<=60)
        {
            int k;
            k=60-t;
            DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
        }
        else if(t<=90)
        {
            int k;
            k=t-60;
           DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
        }
        else if(t<=120)
        {
            int k;
            k=120-t;
            DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
        }
        else if(t<=150)
        {
            int k;
            k=t-120;
            DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
        }
        else if(t<=180)
        {
            int k;
            k=180-t;
           DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
        }
        else if(t<=210)
        {
            int k;
            k=t-180;
            DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
        }
        else if(t<=240)
        {
            int k;
            k=240-t;
            DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
        }
        else if(t<=270)
        {
            int k;
            k=t-240;
           DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
        }
        else if(t<=300)
        {
            int k;
            k=300-t;
            DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
        }
        else if(t<=330)
        {
            int k;
            k=t-300;
           DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
        }
        else if(t<=360)
        {
            int k;
            k=360-t;
            DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
        }
        else if(t<=390)
        {
            int k;
            k=t-360;
             DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
            t++;
        }
        else if(t<=420)
        {
            int k;
            k=420-t;
            DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
        }
        else if(t<=450)
        {
            int k;
            k=t-420;
            DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
        }
        else if(t<=480)
        {
            int k;
            k=480-t;
            DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
        }
        else if(t<=510)
        {
            int k;
            k=t-480;
            DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
        }
        else if(t<=540)
        {
            int k;
            k=540-t;
           DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
        }
        else if(t<=570)
        {
            int k;
            k=t-540;
            DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
        }
        else if(t<=600)
        {
            int k;
            k=600-t;
            DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
        }
        else if(t<=630)
        {
            int k;
            k=t-600;
             DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
        }
        t++；
        return DWGeneration;
    }
主要是想要实现计算的时候仿真时间t取0-30，计算时k取0-30，仿真时间t取31-60，计算时k取30-0，仿真时间t取61-90，计算时k取0-30，仿真时间t取91-120，计算时k取30-0，这种循环一直下去，怎么是实现？求指教，谢谢。

第 5 楼

得分:3

private int t=0;
public double DWfromM() {
        int r=t/30;
        //对r判断是否为偶数
        if(r%2==0)
        {
        //为偶数k取0-30
            int k;
            k=t-30*r;
            DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
        }
        else
        {
        //为奇数k取30-0
            int k;
            k=30*(r+1)-t;
            DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
        }
}

第 6 楼

得分:0

先整理个容易看的，非循环的版本，然后用这个做基础，帮你分析一下

程序代码：

public class DWfromMClass {
    private int t = 0;

    public double DWfromM() {
        int DWGeneration = 0;
        int workedDAreaGrowthM = 0;
        int k = 0;
        // 仿真时间t取  0- 30，计算时k取  0-30
        // 仿真时间t取 31- 60，计算时k取 30- 0
        // 仿真时间t取 61- 90，计算时k取  0-30
        // 仿真时间t取 91-120，计算时k取 30- 0
        if (t <= 30) {          k = t;
        } else if (t <= 60) {   k = 60 - t;
        } else if (t <= 90) {   k = t - 60;
        } else if (t <= 120) {  k = 120 - t;
        } else if (t <= 150) {  k = t - 120;
        } else if (t <= 180) {  k = 180 - t;
        } else if (t <= 210) {  k = t - 180;
        } else if (t <= 240) {  k = 240 - t;
        } else if (t <= 270) {  k = t - 240;
        } else if (t <= 300) {  k = 300 - t;
        } else if (t <= 330) {  k = t - 300;
        } else if (t <= 360) {  k = 360 - t;
        } else if (t <= 390) {  k = t - 360;
        } else if (t <= 420) {  k = 420 - t;
        } else if (t <= 450) {  k = t - 420;
        } else if (t <= 480) {  k = 480 - t;
        } else if (t <= 510) {  k = t - 480;
        } else if (t <= 540) {  k = 540 - t;
        } else if (t <= 570) {  k = t - 540;
        } else if (t <= 600) {  k = 600 - t;
        } else if (t <= 630) {  k = t - 600;
        }
        DWGeneration += Math.exp(workedDAreaGrowthM * k) - DWGeneration;
        t++;
        return DWGeneration;
    }

    public static void main(String[] args) {
    }
}

第 7 楼

得分:0

通用的公式如下：最好自己再用一些测试用例检验一下。

k = (t % 60 == 30) ? 30 :
            (t % 60 <  30) ? (t % 30):
            (t % 60 - t % 30 * 2);