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49 lines
1.0 KiB
49 lines
1.0 KiB
#include <windows.h>
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#include <wchar.h>
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int wmain(void) {
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FILETIME ft1 = {0};
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FILETIME ft2 = {0};
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SYSTEMTIME st = {0};
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LARGE_INTEGER li1 = {0};
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LARGE_INTEGER li2 = {0};
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st.wYear = 2016;
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st.wMonth = 12;
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st.wDay = 25;
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int r = SystemTimeToFileTime(&st, &ft1);
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if (r == 0) {
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wprintf(L"Failed to convert system time to file time\n (%d)",
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GetLastError());
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return 1;
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}
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GetSystemTimeAsFileTime(&ft2);
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li1.LowPart = ft1.dwLowDateTime;
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li1.HighPart = ft1.dwHighDateTime;
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li2.LowPart = ft2.dwLowDateTime;
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li2.HighPart = ft2.dwHighDateTime;
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long long int dif = li1.QuadPart - li2.QuadPart;
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int days2xmas = dif / 10000000L / 60 / 60 / 24;
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if (days2xmas == 1) {
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wprintf(L"There is one day until Christmas\n", days2xmas);
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} else if (days2xmas == 0) {
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wprintf(L"Today is Chritmas\n");
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} else {
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wprintf(L"There are %d days until Christmas\n", days2xmas);
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}
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return 0;
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}
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