如何讀取txt文件並存儲在c中的結構數組中

Question

你如何閱讀文本並存儲在結構數組中？

我使用了while，但是有什么方法可以使用嗎？？

1. 你需要用於
2. 閱讀文本，直到它不是 EOF
3. 您不必假設文件大小
4. 使用 &cast[i]。 . 形式
5. 其他地方不需要修改。 我只需要修改將文件內容讀入 cast[] 部分

#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

這段代碼不夠好，但應該給你一些提示。

    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;
        }
    }