#include?
#include?
#include?
#include?
#include?
using?namespace?std;
double?crr[6041][3953];
double?crrt[3953][6041];
double?drr[3953][3953];
double?err[6041][3953];
int?arr[6041];
int?brr[3953];
//vector?user[6041];
int?main（）
{
????int?a?b?c;
????double?sum?x?y?w;
????vector::iterator?iter;
????memset（arr?0?sizeof（arr））;
????memset（brr?0?sizeof（brr））;
????memset（crr?0?sizeof（crr））;
????memset（crrt?0?sizeof（crrt））;
????//for（int?i?=?0;?i?????//????user[i].clear（）;
????//}
????FILE?*fp?=?fopen（“ratings.txt“?“r“）;
????while（!feof（fp））?{
????????fscanf（fp?“%d?%d?%d\n“?&a?&b?&c）;
????????arr[a]++;
????????brr[b]++;
????????crrt[b][a]?=?1;
????????if（c?>?3）?{
???????????//?user[a].push_back（b）;
???????????crr[a][b]?=?1;
????????}
????}
????fclose（fp）;
????//FILE?*fpt?=?fopen（“w.txt“?“a“）;
????for（int?i?=?1;?i?<=?3952;?i++）?{
????????for（int?j?=?1;?j?<=?3952;?j++）?{
????????????sum?=?0;
????????????for（int?z?=?1;?z?<=?6040;?z++）?{
????????????????/*iter?=?find（user[z].begin（）?user[z].end（）?i）;
????????????????if（iter?!=?user[i].end（））
????????????????????x?=?1;
????????????????else
????????????????????x?=?0;
????????????????iter?=?find（user[z].begin（）?user[z].end（）?j）;
????????????????if（iter?!=?user[i].end（））
????????????????????y?=?1;
????????????????else
????????????????????y?=?0;*/
????????????????sum?+=?crr[z][i]*crr[z][j]/arr[z];
????????????}
????????????if（brr[j]?==?0）
????????????????w?=?0;
????????????else
????????????????w?=?sum?/?brr[j];
????????????drr[i][j]?=?w*100000;
????????????//cout?<????????????//fprintf（fpt?“%.0f?“?w*100000）;
????????}
????????//fprintf（fpt?“\n“）;
????}
????//fclose（fpt）;
????for（int?i?=?1;?i?????????for（?int?j?=?1;?j?????????????????err[i][j]?=?0;
????????????for（int?z?=?1;?z????????????????err[i][j]?+=?drr[j][z]?*?crrt[z][i];
????????????}
????????}
????}
????FILE?*fpt?=?fopen（“ww.txt“?“a“）;
????for（int?i?=?1;?i?????????for（int?j?=?1;?j?????????????fprintf（fpt?“%.0f?“?err[i][j]）;
????????}
????????fprintf（fpt?“\n“）;
????}
????fclose（fpt）;
????return?0;
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2018-05-04?23:36??數據挖掘第一次上機報告—16030147001—錢宇珊\
?????文件????????2304??2018-05-03?20:59??數據挖掘第一次上機報告—16030147001—錢宇珊\movie.cpp
?????文件?????????241??2018-04-14?16:26??數據挖掘第一次上機報告—16030147001—錢宇珊\movie.py
?????文件????12553665??2018-04-14?16:26??數據挖掘第一次上機報告—16030147001—錢宇珊\ratings.txt
?????文件?????????156??2018-05-04?23:38??數據挖掘第一次上機報告—16030147001—錢宇珊\readme.txt
?????文件????????1353??2018-05-04?23:02??數據挖掘第一次上機報告—16030147001—錢宇珊\recommend.cpp
?????文件?????????244??2018-05-03?20:29??數據挖掘第一次上機報告—16030147001—錢宇珊\reconmend.py
?????文件????????1346??2018-05-04?23:21??數據挖掘第一次上機報告—16030147001—錢宇珊\verify.cpp
?????文件????34029595??2018-04-17?22:34??數據挖掘第一次上機報告—16030147001—錢宇珊\w.txt
?????文件???????55704??2018-05-04?23:31??數據挖掘第一次上機報告—16030147001—錢宇珊\數據挖掘第一次.docx