檔案在快取中操作

wcout.imbue(locale("chs"));

clock_t start,end;
start = clock();
cfile m_curfile(_t("c:\\design2.dxf"),cfile::moderead);
uint ufilesize = (uint)m_curfile.getlength();
char* istrbuffer = new char[ufilesize]; //輸入緩衝區
char* ostrbuffer = new char[ufilesize]; //輸出緩衝區
m_curfile.read(istrbuffer,ufilesize);//讀取檔案到字元緩衝區
m_curfile.close();
memcpy(ostrbuffer,istrbuffer,ufilesize);//拷貝輸出緩衝區
//可以用下面兩行注釋**，來替代17,18，不過需要多建立乙個string物件
//string str(strbuffer);
//std::istringstream instr(str);
istringstream instr;
instr.str(istrbuffer);//生成字串輸入流物件
char tmp [80] =;
int index = 0;//統計當前行
int num=0;
while(!instr.eof())
if (strcmp(tmp,"eof")==0)//如果沒有結束（dxf檔案以eof字串結束）
break;
} end = clock();
cout << "run time:" << (double)(end-start)/clocks_per_sec <<"seconds " <