一个关于sscanf的问题

bluesgone

环境AIX 4.3
编译器:cc
测试人员:Bluesgone
问题位置:分隔符中间没有数据导致sscanf没有读到后续的数据
时间:2007-11-06
地点:保密
程序用途:保密

fp= fopen("hello.txt","r";
        printf(" open \n";

        fgets(aczLine,1024,fp);
    sscanf( aczLine,"%21[^|]|%21[^|]|%40[^|]|%2[^|]|%20[^|]|%12[^|]|%20[^|]|%20[
^|]|%40[^|]|%6[^|]|%1[^|]|%40[^|]|%20[^|]|%4[^|]|%9[^|]|%3[^|]|%8[^|]|%10[^|\n]"
,
      s1,s2,s3,s4,s5,s6,s7,s8,s9,s10,s11,s12,s13,s14,s15,s16,s17,s1;
        printf("  %s<=>%s<=>%s<=>%s<=>%s<=>%s<=>%s<=>%s<=>%s<=>%s<=>%s<=>%s<=>%s
<=>%s<=>%s<=>%s<=>%s<=>%s \n",
       s1,s2,s3,s4,s5,s6,s7,s8,s9,s10,s11,s12,s13,s14,s15,s16,s17,s1;
我在使用sscanf解析分隔符为"|"的文件的时候,文件如下:
1111|1122|中国银联|13|412331|张学友|123||广东113|231111||||0|1233440|3|0||
第八个||中间没有数据,
sscanf就没有继续读下面的东西了,打印处理的结果就到231111为止,后面的就没有
打进变量了,请问这是为什么?多谢

[ 本帖最后由 bluesgone 于 2007-11-6 17:20 编辑 ]

ivhb

           [           Indicates string data and the normal skip-over-
                       leading-white-space is suppressed.  The left bracket
                       is followed by a set of characters, called the
                       scanset, and a right bracket; the input field is the
                       maximal sequence of input characters consisting
                       entirely of characters in the scanset.  The
                       circumflex (^), when it appears as the first
                       character in the scanset, serves as a complement
                       operator and redefines the scanset as the set of all
                       characters not contained in the remainder of the
                       scanset string.  Construction of the scanset follows
                       certain conventions.  A range of characters may be
                       represented by the construct first-last, enabling
                       [0123456789] to be expressed [0-9].  Using this
                       convention, first must be lexically less than or
                       equal to last; otherwise, the dash stands for itself.
                       The dash also stands for itself when it is the first
                       or the last character in the scanset.  To include the
                       right square bracket as an element of the scanset, it
                       must appear as the first character (possibly preceded
                       by a circumflex) of the scanset, in which case it
                       will not be interpreted syntactically as the closing
                       bracket.  The corresponding argument must point to a
                       character array large enough to hold the data field
                       and the terminating \0, which are added
                       automatically.  At least one character must match for
                       this conversion to succeed.

应该是没有办法的。

bluesgone

原帖由 ivhb 于 2007-11-6 19:21 发表


应该是没有办法的。

So, what I can do is to write a new function for this issue,
sscanf is not powerful enough, it is a pity.

iceviewer

, do it yourself (DIY)

bluesgone

原帖由 iceviewer 于 2007-11-7 10:29 发表
, do it yourself (DIY)

Yup, I'd try a new function, not more flexible than the 'sccanf', but it can work,

that is so great, thank you all the same.