Programming Forums > Application Development > C

jazz · Jun 27th, 2006, 12:04 PM

Hi All,

I have a program which takes a file as input and generates a output file with name FILExxx. The name of output file is hardcoded, and the name is same, whatever inputfile may be.

What I want is, if the input file is test, the output file should be named test_new, If the input file is myprog, the output file should be named as myprog_new.

Quote:

the input file is in some other location i.e.,
./myprog /data/tool2006/Myfile
so, when i do strcpy and strcat and compile the program, the output is generated in the path - /data/tool2006/Myfile_new

I want it in the current directory.

it is taking the whole path for strcpy, instead of only file name. how do i cpy only the file name

Thanx
jazz

Prm753 · Jun 27th, 2006, 12:07 PM

Take the whole name of the input file, and append "_new" to the end of it. Use strcat().

Jun 27th, 2006, 12:09 PM

Use strcat.
char * strcat ( char * dest, const char * src );
It appends src string to dest string. The terminating null character in dest is overwritten by the first character of src. The resulting string includes a null-character at end.

Parameters.

dest
Pointer to a null-terminated string with enough space allocated to contain both src and dest.
src
Null-terminated string to append.
Return Value.
dest is returned.

Portability.
Defined in ANSI-C.

Example.

(Toggle Plain Text)

/* strcat example */
#include <stdio.h>
#include <string.h>

int main ()
{
  char str[80];
  strcpy (str,"strings  ");
  strcat (str,"have been ");
  strcat (str,"concatenated.");
  puts (str);
  return 0;
}

Output:
strings have been concatenated

Infinite Recursion · Jun 27th, 2006, 2:57 PM

With a prefix of './' on the new filename, it will be placed in your current directory.

ex: ./myFile.txt

jazz · Jun 28th, 2006, 3:54 AM

Thankx everyone.

Jun 27th, 2006, 12:07 PM	#2
Prm753 Professional Programmer Join Date: Oct 2005 Location: United States Posts: 447 Rep Power: 4	Take the whole name of the input file, and append "_new" to the end of it. Use strcat(). __________________ The world's first athletic computer geek! The home of PrProgramsStudios How not to post a question: <-- Please don't reply

Jun 27th, 2006, 12:09 PM	#3
Zap Guest Posts: n/a	Use strcat. char * strcat ( char * dest, const char * src ); It appends src string to dest string. The terminating null character in dest is overwritten by the first character of src. The resulting string includes a null-character at end. Parameters. dest Pointer to a null-terminated string with enough space allocated to contain both src and dest. src Null-terminated string to append. Return Value. dest is returned. Portability. Defined in ANSI-C. Example. (Toggle Plain Text) /* strcat example / #include <stdio.h> #include <string.h> int main () { char str[80]; strcpy (str,"strings "); strcat (str,"have been "); strcat (str,"concatenated."); puts (str); return 0; } / strcat example */ #include <stdio.h> #include <string.h> int main () { char str[80]; strcpy (str,"strings "); strcat (str,"have been "); strcat (str,"concatenated."); puts (str); return 0; } Output: strings have been concatenated

Jun 27th, 2006, 2:57 PM	#4
Infinite Recursion Programming Guru Join Date: Jul 2004 Location: United States Posts: 3,467 Rep Power: 8	With a prefix of './' on the new filename, it will be placed in your current directory. ex: ./myFile.txt __________________ http://jasonpowers.net "There are a thousand hacking at the branches of evil to one who is striking at the root."

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Jun 28th, 2006, 3:54 AM	#5
jazz Newbie Join Date: May 2006 Posts: 18 Rep Power: 0	Thankx everyone.

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Programming Forums > Application Development > C

Change the name of output file