#include?
#include?

#define?TRAINING_IMAGES_NUM?50000

int?reverse（int?num）?{
????return?（（num?&?0xff）?<???????????（（num?&?0xff00）?<???????????（（num?&?0xff0000）?>>?8）?|
???????????（（num?&?0xff000000）?>>?24）;
}

void?transform（const?char*?images_fname?const?char*?labels_fname?const?char*?out_fname）?{
????//?---------------------------------------------------------------
????//??images?file‘s?format
????//?===============================================================
????//
????//??[offset]?[type]??????????[value]??????????[description]?
????//??0000?????32?bit?integer??0x00000803（2051）?magic?number?
????//??0004?????32?bit?integer??60000????????????number?of?images?
????//??0008?????32?bit?integer??28???????????????number?of?rows?
????//??0012?????32?bit?integer??28???????????????number?of?columns?
????//??0016?????unsigned?byte????????????????????pixel?
????//??0017?????unsigned?byte????????????????????pixel?
????//??........?
????//??xxxx?????unsigned?byte????????????????????pixel
????//
????//?===============================================================
????//??Pixels?are?organized?row-wise.?Pixel?values?are?0?to?255.
????//??0?means?background?（white）?255?means?foreground?（black）.
????//?---------------------------------------------------------------

????FILE*?fimages?=?fopen（images_fname?“rb“）;
????int?images_magic?images_num?row_num?col_num;

????fread（&images_magic?1?4?fimages）;
????fread（&images_num?1?4?fimages）;
????fread（&row_num?1?4?fimages）;
????fread（&col_num?1?4?fimages）;

????images_magic?=?reverse（images_magic）;
????assert（images_magic?==?0x0803）;
????images_num?=?reverse（images_num）;
????row_num?=?reverse（row_num）;
????col_num?=?reverse（col_num）;

????//?---------------------------------------------------------------
????//??labels?file‘s?format
????//?===============================================================
????//
????//?[offset]?[type]??????????[value]??????????[description]?
????//?0000?????32?bit?integer??0x00000801（2049）?magic?number?（MSB?first）?
????//?0004?????32?bit?integer??60000????????????number?of?items?
????//?0008?????unsigned?byte????????????????????label?
????//?0009?????unsigned?byte????????????????????label?
????//?........?
????//?xxxx?????unsigned?byte????????????????????label
????//
????//?===============================================================
????//?The?labels?values?are?0?to?9.
????//?---------------------------------------------------------------

????FILE*?flabels?=?fopen（labels_fname?“rb“）;
????int?labels_magic?labels_num;

????fread（&labels_magic?1?4?flabels）;
????fread（&labels_num?1?4?flabels）;

????labels_magic=?reverse（labels_magic）;
????assert（labels_magic?==?0x0801）;

????labels_num?=?reverse（labels_num）;
????assert（labels_num?==?images_num）;

????FILE*?fout?=?fopen（out_fname?“w“）;
????unsigned?char?pixel?label;
????for?（int?i?=?0;?i?????????fread（&label?1?1?flabels）;
????????fprintf（fout?“

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件???????48376??2018-03-19?11:06??手寫體識別\README.docx
?????目錄???????????0??2018-03-19?11:28??手寫體識別\code\
?????文件?????????484??2018-03-19?11:28??手寫體識別\code\run.sh
?????文件????????4300??2018-03-19?11:28??手寫體識別\code\transform.c
?????文件?????2206416??2018-03-19?11:06??手寫體識別\testing.tar.gz
?????文件????11053560??2018-03-19?11:14??手寫體識別\training.tar.gz
?????文件?????2217117??2018-03-19?11:06??手寫體識別\validation.tar.gz
?????目錄???????????0??2018-03-19?11:28??手寫體識別\