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Deletes characters from text files

Wilmer Contreras

¿I can delete specific characters of a text file? for example, i have a file text with "123456". I'd like delete the number '3' only. ¿what function can i use?

Parents
  • 0 in reply to ImPer Westermark 

    #include <windows.h>
#include <stdio.h>

int main(int argc, char **argv)
{
  FILE *f;

  char *buffer;
  size_t size;

  f = fopen("temp.txt","rb");

  if (f)
  {
    fseek(f, -1, SEEK_END);
    size = ftell(f);
    fseek(f, 0, SEEK_SET);
    buffer = malloc(size);
    fread(buffer, size, 1, f);
    fclose(f);


    f = fopen("temp.txt","wb");

    if (f)
    {
      fwrite(buffer, size, 1, f);
      fclose(f);
    }

    free(buffer);
  }

// Other architectures might permit

//    fseek(f, -1, SEEK_END);
//    fwrite((void *)f, 0, 0, f);

//    fseek(f, -1, SEEK_END);
//    ftruncate(f);

  return(1);
}

Reply
  • 0 in reply to ImPer Westermark 

    #include <windows.h>
#include <stdio.h>

int main(int argc, char **argv)
{
  FILE *f;

  char *buffer;
  size_t size;

  f = fopen("temp.txt","rb");

  if (f)
  {
    fseek(f, -1, SEEK_END);
    size = ftell(f);
    fseek(f, 0, SEEK_SET);
    buffer = malloc(size);
    fread(buffer, size, 1, f);
    fclose(f);


    f = fopen("temp.txt","wb");

    if (f)
    {
      fwrite(buffer, size, 1, f);
      fclose(f);
    }

    free(buffer);
  }

// Other architectures might permit

//    fseek(f, -1, SEEK_END);
//    fwrite((void *)f, 0, 0, f);

//    fseek(f, -1, SEEK_END);
//    ftruncate(f);

  return(1);
}

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