Question

My code is this. I am reading a file, comparing the word entered by user from data in file and then want to print the next two words from file. How can I do that?

        #include <stdio.h>
        #include <string.h>
        int main()
        {
           //Open the file for reading
                    FILE *in = fopen("data.txt", "r");
           char str[]="file1.txt";
           //fgets buffer
           char buffer[100];

         //Pieces of string tokenized
        char * stringPiece;

         //int for comparing strings
           int compare=2;


        //While loop. Getting lines from file
        while ( fgets(buffer, sizeof(buffer), in) != NULL ){
             fgets(buffer, 100, in);
            // printf("%s\n", buffer);

         stringPiece = strtok (buffer,",");
             while (stringPiece != NULL){


          printf("%s\n",stringPiece);
          compare=strcmp(stringPiece,str);

          if (compare==0){printf("HELP");}

          //printf("%s\n",stringPiece);
          stringPiece = strtok (NULL, " ");
      }
   }
         //Close file
                fclose(in);

                       return 0;
}

I can find the word in file same as what user entered but unable to print the next two words from file. File name is data.txt.

Code formatted to be legible (use vim and =% on the open brace of the main() function, mostly).

#include <stdio.h>
#include <string.h>

int main(void)
{
    //Open the file for reading
    FILE *in = fopen("data.txt", "r");
    char str[]="file1.txt";
    //fgets buffer
    char buffer[100];

    //Pieces of string tokenized
    char * stringPiece;

    //int for comparing strings
    int compare=2;

    //While loop. Getting lines from file
    while ( fgets(buffer, sizeof(buffer), in) != NULL ){
        fgets(buffer, 100, in);
        // printf("%s\n", buffer);

        stringPiece = strtok (buffer,",");
        while (stringPiece != NULL){

            printf("%s\n",stringPiece);
            compare=strcmp(stringPiece,str);

            if (compare==0){printf("HELP");}

            //printf("%s\n",stringPiece);
            stringPiece = strtok (NULL, " ");
        }
    }
    //Close file
    fclose(in);

    return 0;
}

Answer 1

sample of find the word and next two words get

#include <stdio.h>
#include <string.h>

int main() {
    char userInputWord[]="file1.txt";
    char readFromFileData[]="c:,file1.txt,date,size";
    char *tokenPtr,*nextFirstWord,*nextSecondWord;

    tokenPtr=strtok(readFromFileData, ",");
    for(;tokenPtr != NULL;tokenPtr=strtok(NULL, ",")){
        if(0!=strcmp(tokenPtr, userInputWord))
            continue;//skip word
        //find it!
        printf("%s\n",tokenPtr);
        nextFirstWord = strtok(NULL, ",");
        nextSecondWord = strtok(NULL, ",");
        if(nextFirstWord)
            printf("first word is \"%s\"\n", nextFirstWord);
        else
            fprintf(stderr,"first word is nothing!\n");
        if(nextSecondWord)
            printf("second word is \"%s\"\n", nextSecondWord);
        else
            fprintf(stderr,"second word is nothing!\n");
    }
    return 0;
}