C++简单实现Log日志类轻量级支持格式化输出变量

CLog 头 代码很简单 如果需要的直接Ctrl+C  ----Ctrl+V 即可

 #ifndef __CLOG__
 #define __CLOG__
 #include <windows.h>
 #include <string>
 #include <fstream>
 #include <tchar.h>
 #include <ctime>
 class CLog
 {
 public:
     CLog();
     CLog(const std::string LogFile);
     ~CLog();
     template <class T>
     static void WriteLog(T x);
     //支持格式化输出多参数输出
     static void WriteLogFormat(const char* format, ...);
 private:
     static std::string GetFilePath();
     std::string m_LogFilePath;
     static std::string GetSystemTimes();
     static bool IsPathExist(const std::string FilePath);
 };
 //支持输出int double 文本
 template <class T> void CLog::WriteLog(T x)
 {
     std::fstream of(GetFilePath(), std::ios::app);
     if (!of.is_open())return;
     of.seekp(std::ios::end);    //设置文件指针到文件尾部
     of << GetSystemTimes() <<_T("line: ")<<__LINE__<<_T(" value: ")<< x << std::endl;
     of.close();    //关闭文件；
 }
 #endif

CLog.cpp

 #include "Log.h"
 CLog::CLog()
     :m_LogFilePath("")
 {
     m_LogFilePath = GetFilePath();
     if (IsPathExist(m_LogFilePath))
         DeleteFile(m_LogFilePath.c_str());

 }

 CLog::CLog(const std::string LogFile)
     :m_LogFilePath(LogFile)
 {
     if (IsPathExist(m_LogFilePath))
         DeleteFile(m_LogFilePath.c_str());
 }

 CLog::~CLog()
 {
 }

 void CLog::WriteLogFormat(const char* format, ...)
 {
     va_list arglist;
     std::string strArgData;
     char szBuffer[0x1024];
     ZeroMemory(szBuffer, 0x1024);
     va_start(arglist, format);
     vsprintf_s(szBuffer, format, arglist);
     va_end(arglist);
     strArgData = szBuffer;
     std::fstream of(GetFilePath(), std::ios::app);
     if (!of.is_open())return;
     of << GetSystemTimes() << " Line: " << __LINE__ << " Value: " << strArgData << std::endl;
     of.close();
 }

 std::string CLog::GetFilePath()
 {
     std::string FlieTmp;
     TCHAR szPath[MAX_PATH];
     ::ZeroMemory(szPath, MAX_PATH);
     if (!::GetCurrentDirectory(MAX_PATH, szPath))return FlieTmp;
     FlieTmp = szPath;
     FlieTmp += _T("\\log.txt");
     return FlieTmp;
 }

 std::string CLog::GetSystemTimes()
 {
     time_t Time;
     CHAR strTime[MAX_PATH];
     ZeroMemory(strTime, MAX_PATH);
     time(&Time);
     tm t;
     localtime_s(&t, &Time);
     strftime(strTime, , _T("%Y-%m-%d %H:%M:%S "), &t);
     std::string strTimes = strTime;
     return strTimes;
 }

 bool CLog::IsPathExist(const std::string FilePath)
 {
     DWORD dwAttribute = ::GetFileAttributes(FilePath.c_str());
     return dwAttribute != INVALID_FILE_ATTRIBUTES;
 }