linux下可变参数打印

 

参考c++文档的可变参数打印进行修改

#include <stdio.h>
#include <stdarg.h>
#include <time.h>

FILE * pFile = NULL;

void WriteFormatted (const char* pfileName , const char* pfun , const long lline, const char * format, ...)
{
        if(!pFile) return;

        time_t timep;
        time (&timep);
        char tmp[64];
        strftime(tmp, sizeof(tmp),/* "%Y-%m-%d %H:%M:%S"*/"%F %T",localtime(&timep) );

        fprintf(pFile,"%s %s:%s:%ld  ",tmp,pfileName,pfun,lline);

        va_list args;
        va_start (args, format);
        vfprintf (pFile, format, args);
        va_end (args);

}


#define debuglog(format, ...)    WriteFormatted(__FILE__, __FUNCTION__, __LINE__, format, ##__VA_ARGS__)

int main ()
{
        pFile = fopen ("myfile.txt","a+");

        debuglog("Call with %d variable %s.\n",2,"arguments");
        debuglog("Call with %d variable %s.\n",2,"arguments");
        debuglog("Call with %d variable %s.\n",2,"arguments");
        debuglog("Call with %d variable %s.\n",2,"arguments");
        debuglog("Call with %d variable %s.\n",2,"arguments");
        debuglog("Call with %d variable %s.\n",2,"arguments");

        fclose (pFile);
        return 0;
}