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c++ 自定义异常类

时间:2019-06-08 17:50:34      阅读:420      评论:0      收藏:0      [点我收藏+]

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

using namespace std;

class IOException{};
class FileException{};
class UndefineError{};

void my_copy(const char* src_file, const char* dest_file)
{
  FILE *in_file, *out_file;
  in_file = fopen(src_file, "rb");
  if (in_file == NULL)
  {
    throw IOException();
  }

  out_file = fopen(dest_file, "wb");
  if (out_file == NULL)
  {
    throw FileException();
  }

  char rec[1024];
  size_t bytes_in, bytes_out;
  while ((bytes_in = fread(rec, 1, 1024, in_file))>0)
  {
    bytes_out = fwrite(rec, 1, bytes_in, out_file);
    if (bytes_in != bytes_out)
    {
      throw UndefineError();
    }
  }
  fflush(out_file);
  fclose(out_file);
  fclose(in_file);


}


int main()
{
  try
  {
    my_copy("D:\\File\\1.txt", "D:\\File\\20190608\\1.txt");
  }
  catch (IOException e)
  {
    printf("异常一\n");
  }
  catch (FileException e)
  {
    printf("异常二\n");
  }
  catch (UndefineError e)
  {
    printf("异常三\n");
  }


  system("pause");
  return 0;
}

 

c++ 自定义异常类

原文:https://www.cnblogs.com/herd/p/10991087.html

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