如何读取txt文件并存储在c中的结构数组中

Question

how do you read text and store in structure array??

I used while but is there any way using for??

1. you need to use for
2. read the text until it is not EOF
3. you don't have to assume the file size
4. use &cast[i]. . form
5. there is no need to modify elsewhere. I need to modify only read the file contents into cast[] part

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

struct names {
    char  first[20];
    char  last[20];
};

struct date {
    char  month[12];
    int  day,  year;
};

struct person {
    struct  names  name;
    struct  date  birthday;
};

/* Converts "January", "February", ..., "December" 
   into corresponding numbers 1, 2, ..., 12 */
int convert (char *mon) { 
    static const char *month[] = { "January", "February","March","April","May","June","July","August",
        "September","October", "November","December", NULL };

    for (int i = 0; month[i] != NULL; i++) {
        if (strcmp(month[i], mon) == 0) {
            return i + 1;
        }

    }
    return -1;

}
/* argv[1] contains the filename: cast.txt */
main(int argc, char  *argv[]) {
    struct  person  cast[20];
    int  ncast = 0;
    FILE  *f;
    int  i;

    if (argc < 2) {
        fprintf(stderr,  "usage:  %s  filename\n?? argv[0]);
        exit(1);
    }

    if ((f = fopen(argv[1], "r")) == NULL) {
        fprintf(stderr,  "%s: can't open %s\n", argv[0], argv[1]);
        exit(1);
    }

 /* Reads the file contents into cast[] */ << this is where I need help 
int i = 0;
    while ((fscanf(f, "%s", "%s", "%d", "%d", "%d",
        %cast[i].name.last,
        %cast[i].name.first,
        %cast[i].birthday.month,
        %cast[i].birthday.day,
        %cast[i].birthday.year)) != EOf) {

        i++;
    }

fclose(f);

    printf("Cast of Captain America: Civil War\n");
    printf("==================================\n\n");
    printf("Name   (Birthday)\n\n");
    for (i = 0; i < ncast; i++)
        printf("%s, %s  (%02d/%02d/%02d)\n",
            cast[i].name.last, 
            cast[i].name.first,
            convert(cast[i].birthday.month),
            cast[i].birthday.day,
            cast[i].birthday.year % 100);
     
}

here is the text file 

Chris Evans  June 13, 1981
Robert Downey  April 4, 1965
Scarlett Johansson  November 22, 1984
Sebastian Stan  August 13, 1982 
Anthony Mackie  September 23, 1978
Don Cheadle  November 29, 1964 
Jeremy Renner  January 7, 1971  
Chadwick Boseman  November 29, 1976 
Paul Bettany  May 27, 1971
Elizabeth Olsen  February 16, 1989
Paul Rudd  April 6, 1969
Emily VanCamp  May 12, 1986
Tom Holland  June 1, 1996 
Daniel Bruhl  June 16, 1978
Frank Grillo  June 8, 1965

Answer 1

This code is not good enough, but should give you some hints.

    for (int i = 0; i < 20 && !feof(f); ++i) {
        if (fscanf(f, "%s %s %s %d, %d", cast[i].name.last,
                   cast[i].name.first, cast[i].birthday.month,
                   &cast[i].birthday.day, &cast[i].birthday.year) != 5) {
            break;
        }
    }