I'm unable to write the integer value 13 into a file using any of the file handling functions available on C including `putw()`, `fprintf()`, and `fwrite()`.

```
#include <stdio.h>
#include <conio.h>

void main()
{
  int i;
  int arr[]={10, 11, 12, 13, 14, 15};
  FILE *fp;
  if (fp = fopen("test", "w")) {
        for(i=0; i<6; i++) {
            putw(arr[i], fp);
        }
  }
  fclose(fp);
  fp = fopen("test", "r");
  while ((i=getw(fp))!= EOF) {
        printf("%d, ",i);
  }
  fclose(fp);
  getch();
}

```

gives an output 

```
10, 11, 12, 3584, 3840,

```

and a modified array

```
int arr[]={13, 11, 12, 13, 14, 15};

```

gives an output 

```
2816, 3072, 0, 14, 15, 

```

You can notice that the output is not as expected after encountering the **value 13**.
Can anyone help me with this problem?