c - 如何从文件中获取替代行并将其作为字符串存储到结构中？

Question

我有一个文件需要通过代码读取。该文件如下所示。文件的第一行包含一个整数，表示文件中日记条目的数量。我需要编写一个 C 程序来读取文件并将内容存储在动态分配的结构数组中。

4
12/04/2010 
Interview went well I think, though was told to wear shoes. 
18/04/2010 
Doc advised me to concentrate on something... I forget. 
03/05/2010
Was asked today if I was an art exhibit. 
19/05/2010 
Apparently mudcakes not made of mud, or angry wasps.

我能够 strtok() 将日、月和年存储在我的结构中，但是我一直坚持将字符串保存到我的结构中。 这是我的 strtok() 代码，

FILE* file=fopen("struct.txt","r");
        if (file==NULL){
            perror("Error opening file\n.");}
            else {
                fscanf(file,"%d",&size);
                 res=(Diary*)malloc(size*sizeof(Diary));
                 fscanf(file,"%*[^\n]");
while(fgets(day,1024,file)!= NULL){
    oken=strtok(day,"/");
    h[i]=atoi(oken);          */h[i] is my day
    oken=strtok(NULL,"/");
    fre[i]=atoi(oken);        */fre[i] is the month
    oken=strtok(NULL,"/");
    re[i]=atoi(oken);          */ re[i] is the year
    okena=strtok(day,"\n");
    strcpy(rese[i],okena);    */i had declared rese as char rese[1024]
    printf("%s",okena);
    i++;
   }

程序无法使用 strcpy()，当我运行它时，它不断崩溃。但是，如果我删除 strcpy()，它将打印如下:

12
Interview went well I think, though was told to wear shoes. 
18
Doc advised me to concentrate on something... I forget. 
03
Was asked today if I was an art exhibit. 
19
Apparently mudcakes not made of mud, or angry wasps.

这也不是我想存储在结构中的字符串。我陷入了如何将字符串存储到结构中的困境。我的结构是

typedef struct journal{
int day;
int month;
int year;
char entry[1024];
} Diary;

有好心人可以告诉我哪里出了问题吗？

Answer 1

以下建议代码:

1. 执行所需的功能
2. 为“神奇”数字赋予有意义的名称
3. 将结构定义与该结构的 typedef 分开
4. 更新/编辑了最新的问题详细信息

现在建议的代码:

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

#define MAX_LINE_LEN 1024

struct journal
{
    int day;
    int month;
    int year;
    char entry[ MAX_LINE_LEN ];
};
typedef struct journal Diary;


int main( void )
{

    FILE* file=fopen("struct.txt","r");
    if ( !file )
    {
        perror("fopen failed");}
        exit( EXIT_FAILURE );
    }

    // implied else, fopen successful

    char line[ MAX_LINE_LEN ];
    int size;

    if( fgets( line, sizeof line, file ) )
    {
        if ( sscanf( line, "%d", size ) != 1 )
        {
            fprintf( stderr, "scanf for data count failed\m" );
            exit( EXIT_FAILURE );
        }

        // implied else, input of data count successful
    }

    else
    {
        perror( "fgets for data count failed" );
        exit( EXIT_FAILURE );
    }

    // implied else, fgets successful


    Diary myDiary[ size ];  // uses VLA (variable length array feature of C


    size_t i = 0;
    char *token = NULL;

    while( i < size && fgets( line, sizeof( line ), file) )
    {
        token = strtok( line, "/" );
        if( token )
        {
            myDiary[i].day = atoi( token );

            token = strtok( NULL, "/" );
            if( token )
            {
                myDiary[i].month = atoi( token );

                token = strtok( NULL, "/" );
                if( token )
                {
                    myDiary[i].year = atoi( token );

                    // input data directly into struct instance
                    fgets( myDiary[i].entry, MAX_LINE_LEN, file );
                }
            }
        }
        i++;
    }
}