Search string in a text file

Question

ricciola 0 Newbie Poster

17 Years Ago

I have a problem. I have a function that search a string in a text file. This function return an int: 0 if the string I must be search isn't in the file, 1 otherwise.
The problem is: if the searching string is "input1" and in the file there is a string "counter_input1" the function return 1 instead must be return 0.
Bye
:idea: :idea: :idea:

c

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Latest Post 8 Years Ago Latest Post by shentong

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SpS 34 Posting Pro

17 Years Ago

Post your code plz....

Ancient Dragon 5,243 Achieved Level 70

17 Years Ago

when the string is found, check the character immediately before and after to see if it is a space. If not a space, then the string is not what you want.

Micko 2 Junior Poster

17 Years Ago

Well, in that case it would be nice to post your solution...

Ancient Dragon 5,243 Achieved Level 70

16 Years Ago

use fgets() instead of fgetc() and your program will work better and be a lot less complicated.

delete line 5, NULL is defined in standard c header files.

remove the braces on lines 11, 12 and 13. They are not necessary there.

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ricciola 0 Newbie Poster · Answer 1 · 2005-11-07T12:58:39+00:00

Good morning!
I have resolved my problem! I have used the strtok function....
Thank you
Bye ricciola

ricciola 0 Newbie Poster · Answer 2 · 2005-11-08T17:59:55+00:00

Well, in that case it would be nice to post your solution...

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <malloc.h>

#define IOError     	-1
#define MEMORYError 	-2
#define NOError      	 0

const char searchingString[20];	  		//string to search

char sizeLineInput[512];  				
char sizeLineOutput[512]; 				
char *pStart;			  				
char *pEnd;				  				
char *token;
int k;
						               

int findWord(FILE *SourceFile, char searchingString[20]){
	
	  	if (SourceFile != NULL){
    			while (fgets(sizeLineInput, 512, SourceFile)!=NULL){
    			sizeLineOutput[0] = '\0';
    		        pStart = sizeLineInput;
    		        token = strtok(sizeLineInput ," ");
    		        do{
		    		token = strtok('\0',", ");
		    		if (token){ 
		    		    		
		       		if(strcmp(token,searchingString) == 0){ 
		    			//printf("%d\n",k);
		    			k = 0;    	
		    		}
		    		if(strcmp(token,searchingString) == -1){
		    			//printf("%d\n",k);
		    			k = -1;
		    		}
		    		if(strcmp(token,searchingString) == 1){
		    			//printf("%d\n",k);
		    			k = 1;
		    		}
		    		}
		    	}while(token);
		    	//printf("%d\n",k);
		    	if (k==0) return k;
		}
    	}
    	return -1;
 }

<< moderator edit: added [co[u][/u]de][/co[u][/u]de] tags >>

rajuss -1 Newbie Poster · Answer 3 · 2007-04-05T00:57:24+00:00

hi i m trying but couldnt able to do the progrm.
the program is in c & its on finding a string from a text file.
so please help me out to doing it:sad:

Aia 1,977 Nearly a Posting Maven · Answer 4 · 2007-04-05T04:16:46+00:00

hi i m trying but couldnt able to do the progrm.
the program is in c & its on finding a string from a text file.
so please help me out to doing it:sad:

Sorry, I can not make sense of what is your question or problem.
Could you state it in other words?.

Did you tried the posted code and it didn't work for you? or you are having problems in creating a program that does the same thing?.

WaltP 2,905 Posting Sage w/ dash of thyme Team Colleague · Answer 5 · 2007-04-05T06:36:54+00:00

hi i m trying but couldnt able to do the progrm.
the program is in c & its on finding a string from a text file.
so please help me out to doing it:sad:

Sure. If you would
1) explain what you've tried
2) show what you've tried (read this)
3) not hijack someone else's thread -- make your own

rajuss -1 Newbie Poster · Answer 6 · 2007-04-09T20:13:42+00:00

hi, i have done the following codding its of searching perticular string
from text file. but it couldnt work please help me out

#include <stdio.h>
#include <ctype.h>
#include <conio.h>
#include <string.h>
#define NULL 0
//char cut(char,char);
main()
{
  clrscr();
  int i=0,j=0;
  char s[18]={"<nx-charging:date>"};
  char s1[23]={"<nx-charging:serviceID>"};
  char s2[25]={"<nx-charging:finalStatus>"};
  //char s[]={"<nx-charging:date>"};
  FILE *fpt;
  char ch,c,b[23],a[18];
  if((fpt=fopen("d:\\sample2.txt","r"))==NULL)
    printf("\nERROR - cannot open the file ");
  else
    do
    {
      c=fgetc(fpt);
      a[i]=c;
      i++;
      a[i];
      if(i==18)
      {
 if(strcmp(a,s)==0)
 {
   /*int k;
   for(k=0;k<18;k++){
   while(a[k]!='<')
   {
     printf("%s",ch);
   }*/printf("\n%s",a);
   break;
 }
       /* else
   cut(a,n);
 /*{
   int l;
   for(l=0;l<strlen(a);l++)
   {
     if(l!=strlen(a)-1)
     {
       a[i]=a[i+1];
     }
     else
     {
       goto m;
     }
   }
  }*/
       }
      c=fgetc(fpt);
      b[j++]=c;
      if(j==23)
      {
 if(strcmp(b,s1)==0)
 {
   /*int j;
   for(j=0;j<18;j++){
   /*while(a[j]!='<')
   {
     printf("%c",ch);
   }*/printf("\n%s",b);break;
 }
      }
      ch=fgetc(fpt);
      b[j++]=ch;
      if(j==25)
      {
 if(strcmp(b,s2)==0)
 {
   /*int j;
   for(j=0;j<18;j++){
   /*while(a[j]!='<')
   {
     printf("%c",ch);
   }*/printf("\n%s",b);break;
 }
      }
    }while(c!=EOF);
  fclose(fpt);
  getch();
  return 0;
}
/*char cut(char v[18],char m)
{
int l;
for(l=0;l<strlen(v);l++)
{
if(l!=strlen(v)-1)
{
v[l]=v[l+1];
}
else
v[l++]=m;
}
} */

iamthwee · Answer 7 · 2007-04-09T20:29:10+00:00

>#define NULL 0

I get a problem with that?

>clrscr();

Why, no need for this or conio.h which is not standard.

Read the following...Looks like you're comparing chars instead of c-style strings.

http://www.daniweb.com/tutorials/tutorial45806.html

akshay1 0 Newbie Poster · Answer 8 · 2010-08-24T15:32:10+00:00

akshay1 0 Newbie Poster

12 Years Ago

serch string in text file

Adak 419 Nearly a Posting Virtuoso · Answer 9 · 2010-08-24T15:37:32+00:00

Welcome to the forum, Akshay1.

This thread is 3 years old - how about starting a new one? More specifics of your assignment, would help. Also, what is stopping you from including string.h and using strstr() to find your string in the text file.?

shellk007 -3 Newbie Poster · Answer 10 · 2011-02-10T15:07:41+00:00

#include"stdio.h"
#include"conio.h"
#include"stdlib.h"
#include"string.h"
#include"process.h"

void main()
{
    FILE *fp;
    char ch, search_string[25], temp[25];
    int  i=0, k, search_len;
    long int count=0;


    puts("Enter a string to be searched\n");
    scanf("%s",search_string);
    search_len=strlen(search_string);
    printf("%d",search_len);


    if((fp=fopen("site_startup.tra","r"))==NULL)
    {
        puts("open error");
        getch();
        exit(0);
    }

    while((ch=fgetc(fp))!=EOF)
    {
        if(i<search_len)
        {
            temp[i]=ch;
            ++i;
        }

        if(i==search_len)
        {

            count++;
            temp[i]='\0';
            k=stricmp(search_string,temp);

            if(k==0)
            {
                printf("search successful\n");

            }


            i=0;
            fseek(fp,count,SEEK_SET);

        }
    }
}

this is the easiest way to do it.

To do what, exactly? Show people a bad way to program? If so, then yes, this is one way to write bad (and dangerous) code.

shentong 0 Newbie Poster · Answer 11 · 2014-07-16T07:48:52+00:00

I think TextFinding.com may help you. It is a useful and easy tool to search string in a text file

Search string in a text file

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