--- pushkar raj <[EMAIL PROTECTED]> wrote:
> Hi everybody,
>
> I have a text file which contains a sequence of
> characters terminated by newline.
> I need to extract a sequence of character from the
> file until i encounter underscore character.
> The moment I encounter underscore character, I need
> to move to the next line.
> This process is to be repeated till I reach the end
> of file.
>
> The code that I have been trying is given below.....
> The problem with this code is that the loop doesn't
> terminate.
>
> #include<stdio.h>
> #include<conio.h>
> #include<stdlib.h>
>
> int main()
> {
> FILE *fp1, *fp2;
> char ch;
> clrscr();
> fp1=fopen("11.txt","r"); //the text file from
> which I have to extract the string.
> if(fp1==NULL)
> {
> printf("\n File not found");
> exit(0);
> }
> fp2=fopen("12.txt", "w"); // the file into which I
> have to write the extracted string
>
> while(!feof(fp1))
> {
> ch=fgetc(fp1); //the loop which extracts the
> character till _ is reached
> if(ch!='_')
> {
> fputc(ch, fp2);
> }
> else if(ch!='\n') //the loop which runs till new
> line is reached, this loop
> doesn't terminate.
> {
> ch=fgetc(fp1);
> }
> }
> printf("\n Successfully completed...");
> fclose(fp1);
> //fclose(fp2);
> getch();
> return 0;
> }
>
>
> Please suggest an improvement on this piece of code
> or debug the logical error in the code.
>
> The sample of file is as shown......
> pus||hkar_sjs
> pu#|shkar2001_sjs
>
> I need only the sequence of character upto _..
> Rest of the characters are not be copied into the
> other file.
>
>
>
>
> ---------------------------------
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> [Non-text portions of this message have been
> removed]
>
>
This would be MUCH simpler if done in c++, but here is
a solution in c.
int main()
{
FILE *fp1, *fp2;
char ch;
bool IgnoreRestOfLine = false;
// clrscr();
fp1=fopen("11.txt","r") ; //the text file from which
I have to extract the string.
if (fp1==NULL)
{
printf("\n File not found");
exit(0);
}
fp2=fopen("12.txt", "w"); // the file into which I
have to write the extracted string
while (!feof(fp1))
{
ch=fgetc(fp1) ; //the loop which extracts the
character till _ is reached
if (ch == '\n')
{
IgnoreRestOfLine = false;
fputc('\n', fp2); // Adds a new line to the
output file
continue;
}
if (ch!='_' && !IgnoreRestOfLine)
fputc(ch, fp2);
else
IgnoreRestOfLine = true;
}
printf("\n Successfully completed... ");
fclose(fp1);
fclose(fp2) ;
// system("PAUSE");
return(0);
}
Mickey M.
Construction Partner Inc.
http://www.constructionpartner.com
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