15_548.cpp

15_548.cpp

#include <windows.h>
#include <shlobj.h>
#include <shlwapi.h>
#include <stdio.h>
#include <vector>
#pragma comment(lib, "shlwapi.lib")
std::vector<FILETIME> filetimes;
void DoRecurse(LPCWSTR dir)
{
    WCHAR szPath[MAX_PATH];
    lstrcpyW(szPath, dir);
    PathAppendW(szPath, L"*");

    WIN32_FIND_DATAW find;
    HANDLE hFind = FindFirstFileW(szPath, &find);
    if (hFind != INVALID_HANDLE_VALUE)
    {
        do
        {
            if (find.cFileName[0] == L'.')
            {
                continue;
            }
            if (find.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
            {
                WCHAR szPath2[MAX_PATH];
                lstrcpyW(szPath2, dir);
                PathAppendW(szPath2, find.cFileName);
                DoRecurse(szPath2);
            }
            else
            {
                filetimes.push_back(find.ftLastWriteTime);
            }
        } while (FindNextFileW(hFind, &find));
    }
    FindClose(hFind);
}
int main(void)
{
    WCHAR szPath[MAX_PATH];
    SHGetSpecialFolderPathW(NULL, szPath, CSIDL_PERSONAL, FALSE);
    DoRecurse(szPath);

    FILETIME local;
    SYSTEMTIME st;
    DWORD seconds[7] = { 0 };
    DWORD count[7] = { 0 };
    for (size_t i = 0; i < filetimes.size(); ++i)
    {
        FileTimeToLocalFileTime(&filetimes[i], &local);
        FileTimeToSystemTime(&local, &st);
        seconds[st.wDayOfWeek] += (st.wHour * 60 + st.wMinute) * 60 + st.wSecond;
        count[st.wDayOfWeek]++;
    }

    LPCSTR wd = "日月火水木金土";
    for (int i = 0; i < 7; ++i)
    {
        printf("%.2s: ", &wd[i * 2]);
        if (count[i])
        {
            DWORD average = seconds[i] / count[i];
            printf("%02d:%02d:%02d\n", average / 60 / 60 % 60,
                   average / 60 % 60, average % 60);
        }
        else
        {
            puts("-");
        }
    }
    return 0;
}