C++文件输出自动命名

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C++文件输出自动命名

一、

#include <iostream.h>
#include <fstream.h>
#include <stdlib.h>
#include <string.h>

int main()
{
       ofstream outfile;
       int i;
       char tmp[20],name[20];
       for (i=100;i<=1000;i+=100){
      itoa(i,tmp,10);
      strcpy(name,"filename_"); //前面的filename_
      strcat(name,tmp); //文件序号
      strcat(name,".dat"); //文件后缀名
      outfile.open(name,ios::out);
      if(!outfile)
       {
            cerr<<"File could not be open."<<endl;
            abort();
       }
       outfile<<"Hi, I'am Microsoft Visual C++, how are you?"<<endl;
       outfile.close();
       }
       return 0;
}

二、

#include <iostream.h>
#include <fstream.h>
#include <stdlib.h>

int main()
{
       ofstream outfile;
       int i;
       char name[20];
       for (i=100;i<=1000;i+=100){
      sprintf(name,"filename_%d.dat",i); //简单的一句话搞定。具体用法参考printf
      outfile.open(name,ios::out);
      if(!outfile)
       {
            cerr<<"File could not be open."<<endl;
            abort();
       }
       outfile<<"Hi, I'am Microsoft Visual C++, how are you?"<<endl;
       outfile.close();
       }
       return 0;
}

参考自：

http://blog.emuch.net/73507/viewspace-6480.html