小编srs*_*sci的帖子

大家好我在perl上有简单的新手问题.我正在查看某人的perl代码,他有一些变量声明如下:

my $OutputFiles=[];
$OutputFiles = 
[
 { FID => 789133, TAGE => "BRWSGF_05K", nfiles => 1, Suffix => 'jpg' },
 { FID => 789134, TAGE => "BRWSGF_W05K", nfiles => 1, Suffix => 'jpg' }, 
 { FID => 789135, TAGE => "BRWSGF_E05K", nfiles => 1, Suffix => 'jpg' },
];

它似乎是某种哈希数组,但变量声明$OutputFiles不像数组那样,所以我很困惑.请让我知道$OutputFiles应该是什么变量,以及如何操纵这样的变量.我再次坦率地承认我是Perl新手.

我在一段相当简单的代码上遇到了一个奇怪的问题.代码的相关部分如下:

void foo(int32 in_sd_id, int32 out_sd_id)
{
    int32 nsds;                     /* number of data sets in the file */
    int32 nattr;                    /* number of global attributes in the file */
    int32 attr_cnt;                 /* count of number of attribute */
    int32 attr_index;               /* attribute index */
    int32 attr_type, attr_size;     /* attribute type and size */
    char attr_name[40];  



    ret = SDfileinfo(in_sd_id, &nsds, &nattr);
    printf("nattr is %d\n", nattr);
    /* test to see if num_datasets and num_global_attr can be retrieved from in_sd_id */
    if (ret …