about c/c++ 问题�

[yuyazhang]

Hello everyone!
Today, I programed a program with c,but regrettly i didn't success;
My programe is as follows:

#include <stdio.h>
int main()
{
FILE* pFile ;

pFile = fopen("yuya.txt","wt");

if(pFile != NULL)
fputs("fopen is a function!",pFile);

fclose(pFile);

pFile = fopen("yuya1.pdf","w+");

if(pFile != NULL)
fputs("zhangyuya is a student !",pFile);
fclose(pFile);

return 0;
}

Problem: i create a PDF file successfully,but i don't open it with
adobe reader,as though i write many text in it, but i read its content
which i write with VC IDE,
WHY?

[Phlip]

yuyazhang wrote:

To help you get better responses from USENET, please Google for the FAQ for
this newsgroup. You might find things like...

- how to write a good subject line
- there is no language C/C++
- questions about C get the best answer on news:comp.lang.c
- C++ systems are easier to use, and you should learn them first

You may have a professor who does not understand the last one. Or you may
have signed up for a C class, not C++.

Here's your answer:

pFile = fopen("yuya1.pdf","w+");

It takes more than a .PDF extension to make a Portable Document Format
program. Open a real PDF file with Notepad, or the VC IDE, and look at it.
It is a binary format, not text, and it is compressed and delimited in ways
you should not yet worry about.

--
Phlip
http://www.greencheese.org/ZeekLand <-- NOT a blog!!!

[Simon Biber]

yuyazhang wrote:

Hello everyone!
Today, I programed a program with c,but regrettly i didn't success;
My programe is as follows:

#include <stdio.h>
int main()
{
FILE* pFile ;

pFile = fopen("yuya.txt","wt");

if(pFile != NULL)
fputs("fopen is a function!",pFile);

fclose(pFile);

pFile = fopen("yuya1.pdf","w+");

if(pFile != NULL)
fputs("zhangyuya is a student !",pFile);
fclose(pFile);

return 0;
}

Problem: i create a PDF file successfully,but i don't open it with
adobe reader,as though i write many text in it, but i read its content
which i write with VC IDE,
WHY?

You just gave it a name ending with .pdf. That is not enough to make it
a real PDF file. You just have a text file with the wrong extension.

If you want to create a real PDF file, use "wb" (binary mode), and start
learning about the PDF file format.

Download (3174K)
Portable Document Format Reference Manual Version 1.3
March 11, 1999 (Acrobat) [Adobe]
http://www.wotsit.org/download.asp?f=pdfspec

You may find it easier to output PostScript, as that is a simple text
format, and use an external program (ps2pdf) to convert that to a PDF.

--
Simon.

[yuyazhang]

Thank you ! i can understand what you say,mainly i find it is few
pepole on news:comp.lang.c !

[yuyazhang]

Thank you for giving me a lot of advice ! thank you !