there is a easy way to visualize and modify a txt file? - c

Question

i'm having a little big trouble in c. in particular im not able to save and modify a .txt file on an easy and efficient way.
the fact is: from a file.txt, i have to save all the words on a struct, and after that i will have to do some operations on this, like modify a specific word, a bubble sort, ecc ecc.
Im having problem on how to correctly save all the words in the struct, in the most generic possible way, even if a word from a line of the file is missing.
i mean:
1 line: word1 word2
2 line: word3
3 line: word4 word5
So even if a word is missing, i need to be able to save all this words, leaving something like a missing space in the struct.
the code that im posting is, at the moment, the best i can make with my hands, because i dont have any more ideas about what i should do.
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#define MAX (10) //<- is 10 because the max numbers of letters in any single word is less than 10
struct word{
char word1[MAX+1]; //<- here im defying a struct with 2 char. this struct will contain the words coming out from the file.
char word2[MAX+1]; //<- max+1 because i have ti give 1 space for the " " or the "/n" case.
};
struct word *file_read(FILE *fp, int *count){
int dim = 2; //<- the int dim is the dimensione
char buf[1024]; //<- a simple buffer
struct word *w;
int conv = 0; //<- another counter that i will use in sscanf
int i;
if(!(w = calloc(dim , sizeof(*w)))){
free(w);
}
while(fgets(buf, sizeof(buf),fp)!= NULL){
conv = sscanf(buf, "%s %s", w->word1, w->word2);
if(conv >= 1){ //if conv doesnt increase, just no print
printf("\n%s ", w[*count].word1);
}
if(conv == 2){ //the same operation
printf("%s", w[*count].word2);
}
i++;
if(*count>= dim){
dim *= 2;
struct word* temp = realloc(w, sizeof(*w)*dim);
if(temp != NULL){
w = temp;
} else{
free(w);
return NULL;
}
(*count)++;
}
}
return w;
}
int main(int argc, char *argv[]){ //<- the file will be passed by argv[1] argument
FILE *fp; //<- im defying the FILE type
fp= fopen(argv[1], "r"); //<- im opening the file passed from argv[1], in reading mode
if(fp == 0){ //<- if file is not loaded, the programm have to stop.
printf("FILE IS NOT LOADED");
return 1;
}
struct word *w; //<- im creating a struct pointer called w
int count= 0;
if(!(w = file_read(fp, &count))){ //<- going to do the reading subroutine
return 0;
}
//AFTER THE READING, I SHOULD BE ABLE TO SAVE ALL THE WORDS IN THE STRUCT
//AND I SHOUL BE ABLE TO DO SOME OPERATIONS, LIKE VISUALIZE IT DIFFERENT WAYS
//DO BUBBLE SORT, QSORT, MODIFY THE WORDS IN THE STRUCT, ECC...
}
so, please, how can i make it works???? thank you everybody.
i hope i've been clear :)

Answer 1

user3386109's suggestion of adding int conv to the word structure is good. Still there are errors:
(*count)++ is out of place, so that it's never reached. Move it to the place of the pointless i++.
In order to not store every line's words in the first structure, change all w-> to w[*count]..