小编ana*_*kos的帖子

是否可以在构造函数外部初始化静态const值？可以在找到成员声明的同一地点进行初始化吗？

class A {
private:
  static const int a = 4;
  /*...*/
};

四元数比较可能吗？我正在编写一个Java类的Quaternions,我想实现Comparable接口来使用该Collections.sort(List<Quaternion>)工具.我不是数学专家,我真的不明白我读到的关于四元数的事情.那么,任何人都可以告诉我,我可以覆盖compareToQuaternions 的方法以及如何？

我的班级宣誓:

public class Quaternion implements Serializable, Comparable<Quaternion> {

    private double s; // scalar part
    private double i, j, k; // vectorel part


    public Quaternion() {
        super();
    }

    public Quaternion(double s, double i, double j, double k) {
        super();
        this.s = s;
        this.i = i;
        this.j = j;
        this.k = k;
    }

将向用户显示扩展名为 *.docm 的模板报告，用户将对其进行修改，然后单击“保存”按钮。我想将修改后的文档作为accessionID.docm写入指定的文件夹中。FileFormat = 对象必须是什么？

private void btnSaveDocument_Click(object sender, EventArgs e)
{
    if (m_docFileName == ReportWrite.m_templateReport)
    {
        m_docFileName = ReportWrite.m_accessionId.ToString();
        object FileName = RIS_CLIENT.Properties.Settings.Default.DownloadPath + "\\" + m_docFileName;
        object FileFormat = Word.WdSaveFormat.wdFormatRTF;
        object LockComments = false;
        object AddToRecentFiles = false;
        object ReadOnlyRecommended = false;
        object EmbedTrueTypeFonts = false;
        object SaveNativePictureFormat = true;
        object SaveFormsData = false;
        object SaveAsAOCELetter = false;
        object missing = false;

        objWinWordControl.document.SaveAs(
            ref FileName, 
            ref FileFormat, 
            ref LockComments,
            ref missing, 
            ref AddToRecentFiles, 
            ref missing,
            ref ReadOnlyRecommended, 
            ref …

是否可以在获取或设置（重命名）文件名时提供文件的绝对路径，并以struct stat实例作为lstat函数的参数？正如我在文档中发现struct那样；

struct stat {
    dev_t     st_dev;     /* ID of device containing file */
    ino_t     st_ino;     /* inode number */
    mode_t    st_mode;    /* protection */
    nlink_t   st_nlink;   /* number of hard links */
    uid_t     st_uid;     /* user ID of owner */
    gid_t     st_gid;     /* group ID of owner */
    dev_t     st_rdev;    /* device ID (if special file) */
    off_t     st_size;    /* total size, in bytes */
    blksize_t st_blksize; /* blocksize for filesystem I/O */
    blkcnt_t  st_blocks;  /* number of blocks …

I've a time ticker event, I want to write it to a label in format ( hours:minutes:seconds 00:00:00 ) it does not print the 0 values! it shows like ::1 when starts to count... what to do? Solved, thanks for all replies

private void timer_Tick(object sender, EventArgs e)
        {
            seconds++;
            if(seconds == 59)
            {
                minutes++;
                seconds = 0;
            }
            if(minutes == 59)
            {
                hours++;
                minutes = 0;
            }

            this.label1.Text = string.Format("{0:##}:{1:##}:{2:##}", hours, minutes, seconds);
        }

我想在python中解析一个字符串.示例字符串是由空格分隔的四个数值.我想解析并转换为浮点值.我正在处理的代码如下.当我调试代码.它永远不会进入else块？什么是遗漏点？

def stringToQuaternion(self, str):
        s = ''
        list = []
        for i in range (0, len(str)):
            if ( str[i] != string.whitespace ):
                s += str[i]
            else:
                list.append(float(s))
                s = ''
        return Quadro(list[0], list[1], list[2], list[3])