Question

#include "stdafx.h"
#include "stdio.h"

int main(int argc, _TCHAR* argv[])
{
   FILE *fp;
   fp = fopen("/tmp/test.txt", "w");
   fprintf(fp, "This is testing...
");
   fclose(fp);

   return 0;
}

i am new to Visual studio but heard that its an awesome IDE for C/C++ i did some basic C and it worked really fine now i have a project to do and i am seriously stuck at this point i am NOT ABLE TO WORK WITH OPENING AND CLOSING FILES IN C when i compile this code it gives me a error

这些图像

http://farm7.static.flickr.com/6092/6311309820_9c06ef4f0a.jpg

http://farm7.static.flickr.com/6221/6310789365_4298e416bd.jpg

DEBUG OUTPUT:::

 FredEx Challenge.exe : Loaded  C:UsersAnunayDocumentsVisual Studio 2010ProjectsFredEx ChallengeDebugFredEx Challenge.exe , Symbols loaded.
 FredEx Challenge.exe : Loaded  C:WindowsSystem32
tdll.dll , Cannot find or open the PDB file
 FredEx Challenge.exe : Loaded  C:WindowsSystem32kernel32.dll , Cannot find or open the PDB file
 FredEx Challenge.exe : Loaded  C:WindowsSystem32KernelBase.dll , Cannot find or open the PDB file
 FredEx Challenge.exe : Loaded  C:WindowsSystem32msvcr100d.dll , Symbols loaded.
 FredEx Challenge.exe : Loaded  C:WindowsSystem32user32.dll , Cannot find or open the PDB file
 FredEx Challenge.exe : Loaded  C:WindowsSystem32gdi32.dll , Cannot find or open the PDB file
 FredEx Challenge.exe : Loaded  C:WindowsSystem32lpk.dll , Cannot find or open the PDB file
 FredEx Challenge.exe : Loaded  C:WindowsSystem32usp10.dll , Cannot find or open the PDB file
 FredEx Challenge.exe : Loaded  C:WindowsSystem32msvcrt.dll , Cannot find or open the PDB file
 FredEx Challenge.exe : Loaded  C:WindowsSystem32imm32.dll , Cannot find or open the PDB file
 FredEx Challenge.exe : Loaded  C:WindowsSystem32msctf.dll , Cannot find or open the PDB file
 FredEx Challenge.exe : Loaded  C:WindowsSystem32advapi32.dll , Cannot find or open the PDB file
 FredEx Challenge.exe : Loaded  C:WindowsSystem32sechost.dll , Cannot find or open the PDB file
 FredEx Challenge.exe : Loaded  C:WindowsSystem32
pcrt4.dll , Cannot find or open the PDB file
 FredEx Challenge.exe : Loaded  C:WindowsSystem32uxtheme.dll , Cannot find or open the PDB file
 FredEx Challenge.exe : Loaded  C:WindowsSystem32dwmapi.dll , Cannot find or open the PDB file
 FredEx Challenge.exe : Loaded  C:WindowsSystem32ole32.dll , Cannot find or open the PDB file
 FredEx Challenge.exe : Loaded  C:WindowsSystem32cryptbase.dll , Cannot find or open the PDB file
 FredEx Challenge.exe : Loaded  C:WindowsSystem32clbcatq.dll , Cannot find or open the PDB file
 FredEx Challenge.exe : Loaded  C:WindowsSystem32oleaut32.dll , Cannot find or open the PDB file
FredEx Challenge.exe has triggered a breakpoint

一、导言

Answer 1

Most likely, the program is unable to create the file /tmp/test.txt, probably because there no /tmp directory exists, or writing is not permitted.

在这种情况下,f open(> Return NUL, 并且由于该方案没有核对收益价值,它将 s(或今年视窗电话)。

Make sure you know what the default drive is when the program runs. Or better yet, remove the path and use the current working directory by specifying the filename as test.txt.

#include <errno.h>
#include <stdio.h>

int main(int argc, char *argv[])
{
   FILE *fp = fopen ("test.txt", "wt");  // t = text mode
   if (!fp)
   {
        fprintf (stderr, "error %d creating file
", errno);
        return 1;
   }
   fprintf (fp, "This is testing...
");
   fclose (fp);
   return 0;
}

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