How to take and print the last word when reading a file?

Question

0.00/5 (No votes)

See more:

C

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#define STRING_LEN 200

int main(){
    FILE * fp1 = fopen("file.csv", "r");
    char string[STRING_LEN], pinFind[STRING_LEN];
    char * pinFound = NULL;
    
    printf("Enter the pin: ");
    scanf("%s", pinFind);

    while(fgets(string, STRING_LEN, fp1)){
      pinFound = strstr(string, pinFind);
      if(pinFound){
        char * word1 = strtok(string, ",");
        char * word2 = strtok(NULL, ",");
        char * word3 = strtok(NULL, ",");
        char * word4 = strtok(NULL, ",");
        char * word5 = strtok(NULL, ",");
        char * word6 = strtok(NULL, ",");
        
        printf("%s", word6);
      }
    }
    return 0;
}

What I have tried:

In this code, I am trying to take the last word from a file but don't know how to do it? The result is like this.

18-10-2020
19-10-2020
20-10-2020

If I use strrchr() to take the last occurence then the last the occurence is newline and it won't return and any result. But I use strchr then the first occurence is also newline, so it won't take the last occurence. Instead the second last occurence will be taken but I want to print the last one.

Here is the file data

Name,ID,Phone number,Pin code,Deposit,Date
Ali Ahmed1,2222222222222,77777,6677,500,17-10-2020
Bilal Khan,2222222222222,77777,1122,500,18-10-2020
Ali Ahmed1,2222222222222,77777,6677,500,17-10-2020
Talha,2222222222222,77777,1122,500,19-10-2020
Ali Ahmed1,2222222222222,77777,1122,500,20-10-2020
Bilal Khan,2222222222222,77777,6677,500,17-10-2020

Posted 19-Oct-20 8:36am

ibilalkayy

Updated 19-Oct-20 20:16pm

CPallini

v2

Add a Solution

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Rick York · Answer 1 · 2020-10-19T10:09:00

I showed you a function that will parse out as many tokens as you want and you are doing this in your code?

All right then.

Why do you have the same literal delimiter string noted six times? They are all the same so make ONE of them. If you don't want newlines then make it part of the one and only delimiter string.

Here's an example :

C++

#define MAX_TOKENS 16
    const char * delims = ",\n";
    char * tokens[ MAX_TOKENS ] = { NULL };
    char pinFind[ STRING_LEN ] = { 0 };   // must have storage for PIN
    int count = 0;
    int x;

    // acquire the user's PIN
    // open the file here

    // read a line of text from the file into string

    while( fgets( string, STRING_LEN, fp1 ) )
    {
        count = ParseTokens( string, delims, tokens, MAX_TOKENS );
        if( count < 6 )  // expect 6 tokens per line
            continue;    // if we don't get them skip this line

        // PIN is the fourth token 

        if( strcmp( pinFind, tokens[ 3 ] ) == 0 )
        {
            printf( "deposit on %s was for %s\n", tokens[ 5 ], tokens[ 4 ] );
            break;
        }
    }

    // close the file

This uses the ParseTokens function I gave you before because it is very easy. I use it often to parse a wide variety of different types of files.

CPallini · Answer 2 · 2020-10-19T20:16:00

What's wrong with

C

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#define STRING_LEN 200

int main()
{
  FILE * fp = fopen("file.csv", "r");
  char string[STRING_LEN];

  while(fgets(string, STRING_LEN, fp))
  {
    char * plast = NULL, * pcur = string;
    while ( (pcur = strtok( pcur, "," )))
    {
      plast = pcur;
      pcur = NULL;
    }
    printf("%s\n", plast);
  }
  return 0;
}

?

How to take and print the last word when reading a file?

2 solutions

Solution 1

Solution 2

Add your solution here

Preview 0