警告：從字符串常量棄用轉換爲ACHAR * A

我有C++這是工作的罰款用gcc 4.1.2版20071124但gcc版本給予警告4.4.6 20120305.請建議的一段代碼：警告：從字符串常量棄用轉換爲ACHAR * A

代碼：

WriteLog(sgca_log_file,"Exception occured in load_sgsn_cdr_arch \n",true);

警告：deprecated conversion from string constant to 'char*'

其中WRITELOG是打印在指定的日誌文件的日誌功能：

void WriteLog(const char* fileName, const char* pLogMsg, bool pTimeRequired) 
{ 
    FILE *lFileDesc = NULL; 
    char lMessage[1000]; 
    char lBuffer[1000]; 
    char lDate[1000]; 
    time_t lRawtime; 
    struct tm * lTimeinfo; 
    char LoaderLogFile[80]; 
    char loaderHome[30]; 
    char * pch; 
    char szdir[30]; 

    try 
    { 
     memset(LoaderLogFile, '\0',80); 
     memset(lMessage, '\0', 1000); 
     memset(lBuffer, '\0', 1000); 
     memset(lDate, '\0', 1000); 

     time(&lRawtime); 
     lTimeinfo = localtime(&lRawtime); 
     strftime(lBuffer, 1000, "| %x - %X | ", lTimeinfo); 
     strftime(lDate, 1000, "%Y_%m_%d", lTimeinfo); 

     if (!strcmp(fileName,"default")) 
     { 
      strcpy(loaderHome, getenv("LOADER_HOME")); 
      sprintf(LoaderLogFile,"%s/log/Loader_%s.log",loaderHome,lDate); 
     } 

     else 
      sprintf(LoaderLogFile,"%s_%s.log",fileName,lDate); 

     if (!file_exists(LoaderLogFile)) 
     { 
      if((pch=strrchr(LoaderLogFile,'/')) != '\0') 
      { 
       strncpy(szdir,LoaderLogFile,pch-LoaderLogFile+1); 
       if(file_exists(szdir)) 
       { 
        lFileDesc = fopen(LoaderLogFile, "a"); 
        fflush(lFileDesc); 
        fclose(lFileDesc); 
       } 
       else 
       { 
        sprintf (lBuffer,"Directory %s doesnot exist. Please check the configurations. Stopping the System. \n",szdir); 
        WriteLog("default",lBuffer,true); 
        StopSystem("default",lBuffer); 
       } 
      } 
      else 
      { 
       sprintf (lBuffer,"Invalid log file name %s \n",LoaderLogFile); 
       WriteLog("default",lBuffer,true); 
       StopSystem("default",lBuffer); 
      } 

     } 

     //! Check whether the timestamp also has to be written in the log file 
     if(pTimeRequired) 
     { 
      sprintf(lMessage, "%s%s\n", lBuffer, pLogMsg); 
     } 
     else 
     { 
      sprintf(lMessage, "%s\n", pLogMsg); 
     } 

     //! Open the log file in append mode 
     lFileDesc = fopen(LoaderLogFile, "a"); 
     if(lFileDesc != NULL) 
     { 
      fprintf(lFileDesc, lMessage); 
      fflush(lFileDesc); 
      fclose(lFileDesc); 
     } 
     else 
     { 
      printf("Unable to open the file \n"); 
     } 



    } 
    catch(...) 
    { 
     printf("Exception occured in WriteLog \n"); 
    } 
}

來源

2013-03-26 sajal

是'WriteLog'你的函數：

通過改變你的函數擺脫警告？聽起來像前兩個參數應該比'char *'更多的是'const char *'。 – chris 2013-03-26 06:29:30

請顯示更多的代碼。順便說一下，GCC的最新版本是4.8，比以前的版本更符合標準。 – 2013-03-26 06:46:14

'WriteLog'不應該導致該錯誤。你確定沒有使用另一個'WriteLog'聲明而不是這個聲明嗎？例如，一個頭中沒有'const'，而你的定義有'const'？ – molbdnilo 2013-03-26 08:36:15

我將宣佈

void WriteLog(const char* fileName, const char* pLogMsg, 
       bool pTimeRequired);

，因爲很可能是你不改變fileName或

來源

2013-03-26 06:29:54

嘗試與建議相同。但又得到了同樣的警告。而且pLogMsg會根據條件不斷變化。 – sajal 2013-03-26 06:37:19

這是因爲字符串文字是不可修改的。但爲了向後兼容，它們被允許被視爲char*而不是const char*。

void WriteLog(char* fileName, const char* pLogMsg, bool pTimeRequired);

來源

2013-03-26 06:30:49 Kyurem

警告：從字符串常量棄用轉換爲ACHAR * A

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