创建共享内存,为什么读出来的数据总是空的呢
我的代码如下:
m_hShareFile = CreateFileMapping(INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE, 0, SHARE_DATA_LENGTH, SHARE_DATA_FILENAME);
if(NULL == m_hShareFile)
{
AfxMessageBox("创建共享内存失败");
return FALSE;
}
m_pbyteShareDataBuffer=(BYTE *) ::MapViewOfFile(m_hShareFile, FILE_MAP_READ | FILE_MAP_WRITE, 0, 0, 0);
*(m_pbyteShareDataBuffer++)=0x1;
*(m_pbyteShareDataBuffer++)=0x11;
*(m_pbyteShareDataBuffer++)=0x12;
*(m_pbyteShareDataBuffer++)=0x13;
*(m_pbyteShareDataBuffer++)=0x14;
char temp[9];
int i=0;
FILE *pf=NULL;
pf=fopen("E:\\a.txt","w");
while(i<5)
{
fseek(pf, 0L, SEEK_END);
sprintf(temp,"%02x ",m_pbyteShareDataBuffer[i]);
fwrite(temp,1,3,pf);
i++;
}
fclose(pf);
写入文件后,里面的00 00 00 00 00,我想问是怎么回事??