写入数据时在std :: ofstream中进行错误处理 [英] Error handling in std::ofstream while writing data

问题描述

我有一个小程序，我在其中初始化字符串并写入文件流:

I have a small program where i initialize a string and write to a file stream:

#include<iostream>
#include<fstream>
using namespace std;
int main()
{
  std::ofstream ofs(file.c_str());
  string s="Hello how are you";
  if(ofs)
     ofs<<s;
  if(!ofs)
  {
       cout<<"Writing to file failed"<<endl;
  }
  return 0;
 }

我的磁盘空间非常小，并且语句" ofs "失败.所以我从逻辑上知道这是一个错误.

My diskspace is very less, and the statement "ofs<" fails. So I know that this is an error logically.

语句"if(！ofs)" 没有遇到上述问题，因此我不知道为什么失败.

The statement "if(!ofs)" does not encounter the above issue, hence I am unable to know why it failed.

请告诉我，通过哪些其他选项我可以知道"ofs 失败了.

Please tell me, by which other options I would be able to know that "ofs< has failed.

提前谢谢.

推荐答案

我找到了类似的解决方案

I found a solution like

#include<iostream>
#include<fstream>
using namespace std;
int main()
{
  std::ofstream ofs(file.c_str());
  string s="Hello how are you";
  if(ofs)
     ofs<<s;
  if(ofs.bad())    //bad() function will check for badbit
  {
       cout<<"Writing to file failed"<<endl;
  }
  return 0;
 }

您还可以参考以下链接那里检查正确性.

You can also refer to the below links here and thereto check for the correctness.

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