收集的一些VC常用函数，陆续加入-优快云博客

本文介绍了几种实用的文件和路径处理方法，包括获取当前路径、文件复制、获取指定目录下的文件名及其标题等。通过这些代码片段，读者可以了解如何在C/C++中进行基本的文件管理和路径操作。

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获取当前路径

bool GetCurrentDir( char * fileName )
{

char filename[512];

GetModuleFileName( NULL , filename , 512);

(strrchr(filename,'\'))[1] = 0 ;

filename[strlen(filename)-1] = 0;

strcpy( fileName , filename );

return 0 ;
}

文件拷贝

int FileCopy
( const char *src,
const char *dst )
{
#define BUFSZ 16000

char            *buf;
FILE            *fi;
FILE            *fo;
unsigned        amount;
unsigned        written;
int             result;

buf = new char[BUFSZ];

fi = fopen( src, "rb" );
fo = fopen( dst, "wb" );

result = COPY_OK;
if  ((fi == NULL) || (fo == NULL) )
{
  result = COPY_ERROR;
  if (fi != NULL) fclose(fi);
  if (fo != NULL) fclose(fo);
}

if (result == COPY_OK)
{
  do
  {
   amount = fread( buf, sizeof(char), BUFSZ, fi );
   if (amount)
   {
    written = fwrite( buf, sizeof(char), amount, fo );
    if (written != amount)
    {
     result = COPY_ERROR; // out of disk space or some other disk err?
    }
   }
  } // when amount read is < BUFSZ, copy is done
  while ((result == COPY_OK) && (amount == BUFSZ));
  fclose(fi);
  fclose(fo);
}
delete [] buf;
return(result);
}

获取指定目录下的文件名:

void GetFilesOfPath(  char * path , CStringArray &straPathes ){

HANDLE   hFindFile;
WIN32_FIND_DATA   FindData;
CString   strPath;

straPathes.SetSize(0,10);

char m_pLayerFilePath[MAX_PATH];
char FileToFindPatten[MAX_PATH];

strcpy( m_pLayerFilePath , path );
strcat( m_pLayerFilePath , "\" );
//strcat( m_pLayerFilePath , "*.TAB" );
strcpy( FileToFindPatten , m_pLayerFilePath );
strcat( FileToFindPatten , "*.TAB" ) ;

hFindFile = FindFirstFile(FileToFindPatten,&FindData);
if(hFindFile == INVALID_HANDLE_VALUE)
  return;
if(FindData.dwFileAttributes != FILE_ATTRIBUTE_DIRECTORY)
{
  strPath.Format("%s%s", m_pLayerFilePath , FindData.cFileName);
  straPathes.Add(strPath);
}
while(FindNextFile(hFindFile,&FindData))
{
  if(FindData.dwFileAttributes != FILE_ATTRIBUTE_DIRECTORY)
  {
   strPath.Format("%s%s", m_pLayerFilePath , FindData.cFileName);
   straPathes.Add(strPath);
  }
}
FindClose(hFindFile);
return;
}

获取指定目录下的文件名(不含路径)

void GetFileTitlesOfPath( char * path ,  CStringArray &straPathes)
{

HANDLE   hFindFile;
WIN32_FIND_DATA   FindData;
CString   strPath;

straPathes.SetSize(0,10);

char m_pLayerFilePath[MAX_PATH];
char FileToFindPatten[MAX_PATH];

strcpy( m_pLayerFilePath , path );
strcat( m_pLayerFilePath , "\" );
//strcat( m_pLayerFilePath , "*.TAB" );
strcpy( FileToFindPatten , m_pLayerFilePath );
strcat( FileToFindPatten , "*.TAB" ) ;

hFindFile = FindFirstFile(FileToFindPatten,&FindData);
if(hFindFile == INVALID_HANDLE_VALUE)
  return;
if(FindData.dwFileAttributes != FILE_ATTRIBUTE_DIRECTORY)
{
  strPath.Format("%s%s", m_pLayerFilePath , FindData.cFileName);
  strPath = GetFileTitleFromFileName(strPath,FALSE);
  straPathes.Add(strPath);
}
while(FindNextFile(hFindFile,&FindData))
{
  if(FindData.dwFileAttributes != FILE_ATTRIBUTE_DIRECTORY)
  {
   strPath.Format("%s%s", m_pLayerFilePath , FindData.cFileName);
   strPath = GetFileTitleFromFileName(strPath,FALSE);
   straPathes.Add(strPath);
  }
}
FindClose(hFindFile);
return;
}

CString GetFileTitleFromFileName(CString FileName, BOOL Ext)
{
    int Where;
    Where = FileName.ReverseFind('\');
    if (Where == -1)
        Where = FileName.ReverseFind('/');
    CString FileTitle = FileName.Right(FileName.GetLength() - 1 - Where);
    if (!Ext)
    {
        int Which = FileTitle.ReverseFind('.');
        if (Which != -1)
            FileTitle = FileTitle.Left(Which);
    }
    return FileTitle;
}

CString GetFilePathFromFileName(CString FileName)
{
    int Where;
    Where = FileName.ReverseFind('\');
    if (Where == -1)
        Where = FileName.ReverseFind('/');
    CString FilePath = FileName.Left(Where);
    return FilePath + '\';
}

//判断是否为数字或字母
//Output:
//return false,true

bool IsAlphaNumeric(char* charp,int len){
char *c;
c=charp;
for(int i=0;i<len;i++){
  if(*c==NULL || *c=='\0')
   return true;
  if(isalnum(*c)==0)
   return false;
  c++;
}
return true;
}

判断是否为数字

bool IsNumeric(char* charp,int len){
    char *c;
    c=charp;
    for(int i=0;i<len;i++){
        //printf("%d",isdigit(*c));
        if(*c==NULL || *c=='