Лекция 22 - Файлове 2

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txt_files.c

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

struct student_t {
  char name[50];
  float score;
  int is_late;
};

int main(int argc, char** argv) {
  struct student_t class[10];

  //printf("argc: %d argv[0]: %s\n", argc, argv[0]);

  if(argc > 1) {
    FILE* file = fopen(argv[1], "r");

    char buff[50];
    int i = 0;
    while(fgets(buff, 50, file) != NULL) {
      //printf("%s ", buff);
      puts(buff);
      buff[strlen(buff) - 1] = '\0';
      strcpy(class[i].name, buff);
      fscanf(file, "%f", &class[i].score);
      fscanf(file, "%d", &class[i].is_late);
      fgetc(file);

      //fflush(file);
      i++;
    }

    fclose(file);

    for(int j=0; j<i; j++) {
      printf("[%d] %s %f %d\n", j, class[j].name, class[j].score, class[j].is_late);
    }

  } else {  
    strcpy(class[0].name, "Georgi");
    class[0].score = 3.4;
    class[0].is_late = 1;

    strcpy(class[1].name, "Alexander");
    class[1].score = 4.3;
    class[1].is_late = 1;

    strcpy(class[2].name, "Daniel");
    class[2].score = 4;
    class[2].is_late = 0;

    FILE* file = fopen("./out.txt", "w");
    for(int i=0; i<3; i++) {
      fputs(class[i].name, file);
      fprintf(file, "\n%f\n%d\n", class[i].score, class[i].is_late);
    }

    fclose(file);
  }

  return 0;
}

bin_files.c

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

struct student_t {
  char name[50];
  float score;
  int is_late;
};

int main(int argc, char** argv) {
  struct student_t class[10];

  if(argc > 1) {
    FILE* file = fopen(argv[1], "rb");
    int i = 3;

    fseek(file, 0, SEEK_END);
    int bite_count = ftell(file);
    //fseek(file, 0, SEEK_SET);
    rewind(file);

    i = bite_count / sizeof(struct student_t);

    fread(class, sizeof(struct student_t), i, file);

    fclose(file);
    for(int j=0; j<i; j++) {
      printf("[%d] %s %f %d\n", j, class[j].name, class[j].score, class[j].is_late);
    }

  } else {  
    strcpy(class[0].name, "Georgi");
    class[0].score = 3.4;
    class[0].is_late = 1;

    strcpy(class[1].name, "Alexander");
    class[1].score = 4.3;
    class[1].is_late = 1;

    strcpy(class[2].name, "Daniel");
    class[2].score = 4;
    class[2].is_late = 0;

    FILE* file = fopen("./out.bin", "wb");

    fwrite(class, sizeof(struct student_t), 3, file);
    /*int i = 123;
    fwrite(&i, sizeof(int), 1, file);*/

    fclose(file);
  }

  return 0;
}