BOOL CompareVersion(LPCTSTR lpszVer1, LPCTSTR lpszVer2, int& nResult) { BOOL bRet = FALSE; do { if ((NULL == lpszVer1) || (NULL == lpszVer2)) { break; } // Version: a.b.c.d #define DEFAULT_MAX_VERSION_COUNT (4) int nVer1[DEFAULT_MAX_VERSION_COUNT] = { 0 }; int nVer2[DEFAULT_MAX_VERSION_COUNT] = { 0 }; ASSERT(_countof(nVer1) == _countof(nVer2)); _stscanf_s(lpszVer1, TEXT("%d.%d.%d.%d"), &nVer1[0], &nVer1[1], &nVer1[2], &nVer1[3]); _stscanf_s(lpszVer2, TEXT("%d.%d.%d.%d"), &nVer2[0], &nVer2[1], &nVer2[2], &nVer2[3]); for (size_t i = 0; i != min(_countof(nVer1), _countof(nVer2)); ++i) { if (nVer1[i] == nVer2[i]) { nResult = 0; continue; } if (nVer1[i] > nVer2[i]) { nResult = 1; break; } if (nVer1[i] < nVer2[i]) { nResult = -1; break; } } // Completed bRet = TRUE; } while (0); return bRet; } // For Example: int nResult = 0; CompareVersion(TEXT("1.0.6.09"), TEXT("1.0.5.102"), nResult); CString strText; strText.Format(TEXT("Result: %d"), nResult); AfxMessageBox(strText);
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