In `C++`, we can use the **`ferror()` function** to check for errors in the input file stream. It returns a non-zero value if the _error indicator_ is set.

# 
## Syntax

    int ferror(FILE* stream);

## 
### `stream`

It represents a pointer to the file stream for which we need to check errors. It is of `FILE*` type.

# 
## Return value

- `0`: It returns $0$ if the file stream does not have any errors.

- `Non-zero`: It returns a _non-zero_ value if errors are in the file stream.

# 
## Required headers

```c++
#include<cstdio>
```

//Including headers
#include <cstdio>
#include <iostream>
using namespace std;

int main() {

   int ch;
   FILE* fp = fopen("file.txt","w");
    
   if(fp) {
      ch = getc(fp);
      if (ferror(fp))
         cout << "Can't read from file";
   }
   fclose (fp);
   return 0;
}

How to use ferror() in C++

Check for input file stream errors in C++ using ferror(), which returns non-zero if errors exist.

How to use ferror() in C++

Syntax

`stream`

Return value

Required headers

Code

Output