可变参数例子

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// a1.h:

#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <iostream>

#define BUFFER_SIZE 1024

int comm_PrintToCsv(FILE *fp,int inum, char* pszarg, ...);

// a1.cpp : コンソールアプリケーション用のエントリポイントの定義
//
extern “C”
#include "stdafx.h"
#include "a1.h"

int main(void)
{
    // file point
   FILE * fp;
   // open file
   if((fp = fopen("C://test.csv","a+"))==NULL)
   {
       printf("can not open/n");
       exit(1);
   }
   int a = comm_PrintToCsv(fp, 3, "aab","bbs","ssd");
   int b = comm_PrintToCsv(fp,5,"saa","bbdgas","asga","111111","44444");
   // close file
   if (fp)
   {
       fclose(fp);
       fp = NULL;
   }
   if (logP)
   {
       fclose(logP);
       logP = NULL;
   }
   return 0;
}

/* */
int comm_PrintToCsv(FILE *fp, int num, char* arg, ...)
{
   // number error
   if(num < 1) return 0;

   va_list ap;
   int n = num;
   // output stringbuffer
   char pszOut[BUFFER_SIZE];
   memset(pszOut, 0x00, BUFFER_SIZE);
   // get parameter list
   va_start(ap, arg);
   // make output stringbuffer header
   sprintf(pszOut, "/"%s/"", arg);

   // make outout stringbuffer from parameter list
   while(--n > 0)
   {
       sprintf(pszOut, "%s,/"%s/"", pszOut, va_arg(ap,char *));
   }

    va_end(ap);
   // output to file
   fputs(pszOut, fp);
   fputs("/n", fp);
    return 0;
}