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#include 

#include 

#include 

#include 

#define READ_MAX 255

static char test_str1[] = "123454567890abcdefghijklmnopqrstufvwxyz";

static char test_str2[READ_MAX];

int main(int argc, char **argv)

{

  int i=0;

  FILE *f;

  //write to file

  debug_printf("Write file...\n");

  f=fopen("testfile.txt","w");

  while(test_str1[i]!='a'){

    fputc(test_str1[i],f);

    i++;

  }

  fclose(f);

  //append to file

  debug_printf("Apend file...\n");

  f=fopen("testfile.txt","a");

  fputs(test_str1+i,f);

  char null_term = '\0';

  fwrite(&null_term, sizeof(char), 1, f);

  printf("Error: %s\n",strerror(errno));

  fclose(f);

  //copy from testfile.txt to copyfile.txt

  debug_printf("Read file...\n");

  f=fopen("testfile.txt","r");

  i=0;

  while((test_str2[i]=fgetc(f))!=EOF && i

    fputc(test_str2[i], stdout);

    i++;

  }

  printf("\n%s\n", test_str1);

  if(!strcmp(test_str2, test_str1)){

    puts("TEST: OK!");

  }else{

    puts("TEST: FAIL!");

  }

  fclose(f);

}