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Replacing comma, poing, double point of a text file

j79
j79 asked
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Medium Priority
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Last Modified: 2010-04-15

Hello,

I'd need a small app, which asks for a text file when started, and replaces all  , . :  with words comma, point, double poing, question mark and so one. After replacing it should save/replace the file.

Thanks
j79

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Top Expert 2004

Commented:
Hi j79,
This smells like homework. I'm sure you're smart enough to figure it out yourself, as it is very simple.

Cheers!

Stefan
Yeah,this is quite simple.
Just a small suggestion.
Open another file in write mode,keep writing into this file as u read from ur original file.
When u encounter any of the characters u want to change,just write the new string in the other file.
If u want to replace the old file,delete it and rename the new file to the old file.

just initialize --
char p[]=" point ", c[]=" comma ", dp[]=" double poing ";
as stated by ankuratvp open two separate FILE streams one for reading ur text file as read mode and the other as the destination file as write mode.
// hope this helps u a bit
#include<stdio.h>
FILE *source, *dest;
char p[]=" point ",d[]=" comma ", dp[]=" double poing ";
/* for other characters similarly provide seperate strings */
void main()
{
 int c;
 source=fopen("xyz.txt","r"); // u can get that from any where
 dest=fopen("xyz1.txt","w");// similarly this
 while((c=fgetc(source))!=EOF)
  switch(c){
   case '.' : {fputs(p,dest);break;}
   case ',' : {fputs(d,dest);break;}
   case ':' : {fputs(dp,dest);break;}
   default : {fputc(c,dest);}
  }
 fcloseall();
}
/* if u want to replace the existing file just include dos.h and
 after fcloseall() write system("del xyz.txt");
and system("ren xyz1.txt xyz.txt");
that will serve ur purpose OF COURSE IF U R IN DOS */

Avik.
j79

Author

Commented:
Thank you Avik77,

it seems to do it very good.
I only would need an input at starting for giving the text file to replace.
How to realize it?

j79
j79

Author

Commented:

Hello sunnycoder,

I'm 24 years old and has no homework since 6 years. You also can see the history of my profile for what "homework" I've asked/answered in the past.
I also has some years experience in java and web development, but not really in C. That's reason why I asked.
Only why my question is sounding like homework for you, it has not to be really a homework, or?

What would it be if I would ask how to replace special characters like " with &quot; or € with &euro; on .html pages?
Still homework?

j79


Hey j79,

Sorry for getting u wrong with the homework thing.

>it seems to do it very good.
>I only would need an input at starting for giving the text file to replace.
>How to realize it?
All u have to do is:
char fn[50];
char ch;
FILE *fp,*out;
scanf("%s",&fn);         //get the entire filename including extension
fp=fopen(fn,"r");              //open the file for reading.
out=fopen("second.txt","w");
//read char by char and write to the new file till EOF
//checking everytime for the chars u want to replace
fclose(out);
fclose(fp);


Here i am assuming that u have already got the code provided by avik77(which i cant see,i guess got edited)

j79

Author

Commented:

Hello ankuratvb,

no problem. I have the code from  Avik77 and I think he should get the most points because he posted the working code.

j79
Yeah,u can still give all the points to him.
Just trying to help out.
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j79

Author

Commented:

I want to thank them who gave their assistance.

j79
Thanks to everybody.
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