user-0 提问: [求助]一个关于scanf函数的问题

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user: user-1
content: 看看帮助文档可能更快，毕竟源码理解耗时，理解也可能出现偏差。 sscanf, swscanfSee Also fscanf | scanf | sprintf | _snprintf  Requirements OS Versions: Windows CE 2.0 and later. Header: stdio.h, stdlib.h. Link Library: coredll.dll. Read formatted data from a string.  int sscanf( const char *buffer, const char *format [, argument ] ... ); int swscanf( const wchar_t *buffer, const wchar_t *format [, argument ] ... ); Parameters buffer  Stored data.  format  Format-control string.  argument  Optional arguments.  Libraries All versions of the C run-time libraries.  Return Values Each of these functions returns the number of fields successfully converted and assigned; the return value does not include fields that were read but not assigned. A return value of 0 indicates that no fields were assigned. The return value is EOF for an error or if the end of the string is reached before the first conversion.  Remarks The sscanf function reads data from buffer into the location given by each argument. Every argument must be a pointer to a variable with a type that corresponds to a type specifier in format.   The format argument controls the interpretation of the input fields and has the same form and function as the format argument for the scanf function; see scanf for a complete description of format. If copying takes place between strings that overlap, the behavior is undefined.  swscanf is a wide-character version of sscanf; the arguments to swscanf are wide-character strings. sscanf does not handle multibyte hexadecimal characters. swscanf does not handle Unicode fullwidth hexadecimal or "compatibility zone" characters. Otherwise, swscanf and sscanf behave identically.  Generic-Text Routine Mappings  TCHAR.H Routine  _UNICODE Defined  _stscanf swscanf   For more information about TCHAR.H routines, see Generic Text Mappings.  Example  /* SSCANF.C: This program uses sscanf to read data items    from a string named tokenstring, then displays them.  */  #include <stdio.h> void main( void ) { char  tokenstring[] = "15 12 14..."; char  s[81]; char  c; int   i; float fp;  /* Input various data from tokenstring: */ sscanf( tokenstring, "%s", s ); sscanf( tokenstring, "%c", &c ); sscanf( tokenstring, "%d", &i ); sscanf( tokenstring, "%f", &fp );  /* Output the data read */ printf( "String    = %s\n", s ); printf( "Character = %c\n", c ); printf( "Integer:  = %d\n", i ); printf( "Real:     = %f\n", fp ); } Output  String    = 15 Character = 1 Integer:  = 15 Real:     = 15.000000 Requirements OS Versions: Windows CE 2.0 and later. Header: stdio.h, stdlib.h. Link Library: coredll.dll. scanf, wscanfSee Also fscanf | printf | sprintf | sscanf  Requirements OS Versions: Windows CE 2.0 and later. Header: stdlib.h. Link Library: coredll.dll. Read formatted data from the standard input stream.  int scanf(     const char* format [,argument]...  );  int wscanf(     const wchar_t* format [,argument]... ); Parameters format  Format control string.  argument  Optional arguments.  Return Values Both scanf and wscanf return the number of fields converted and assigned; the return value does not include fields that were read but not assigned.   A return value of 0 indicates that no fields were assigned.   The return value is EOF for an error or if the end-of-file character or the end-of-string character is encountered in the first attempt to read a character.  Remarks The scanf function reads data from the standard input stream stdin and writes the data into the location given by argument.   Each argument must be a pointer to a variable of a type that corresponds to a type specifier in format.  If copying takes place between strings that overlap, the behavior is undefined.  wscanf is a wide-character version of scanf; the format argument to wscanf is a wide-character string. wscanf and scanf behave identically otherwise.   Generic-Text Routine Mappings  TCHAR.H Routine  _UNICODE Defined  _tscanf wscanf   For more information about TCHAR.H routines, see Generic Text Mappings.  For more information, see Format Specification Fields — scanf functions and wscanf Functions.   Example   /* SCANF.C: This program uses the scanf and wscanf functions   * to read formatted input.   */  #include <stdio.h>  void main( void ) {    int   i, result;    float fp;    char  c, s[81];    wchar_t wc, ws[81];     printf( "\n\nEnter an int, a float, two chars and two strings\n");     result = scanf( "%d %f %c %C %s %S", &i, &fp, &c, &wc, s, ws );    printf( "\nThe number of fields input is %d\n", result );    printf( "The contents are: %d %f %c %C %s %S\n", i, fp, c, wc, s, ws);     wprintf( L"\n\nEnter an int, a float, two chars and two strings\n");     result = wscanf( L"%d %f %hc %lc %S %ls", &i, &fp, &c, &wc, s, ws );    wprintf( L"\nThe number of fields input is %d\n", result );    wprintf( L"The contents are: %d %f %C %c %hs %s\n", i, fp, c, wc, s, ws); } Output  Enter an int, a float, two chars and two strings 71 98.6 h z Byte characters  The number of fields input is 6 The contents are: 71 98.599998 h z Byte characters  Enter an int, a float, two chars and two strings 36 92.3 y n Wide characters  The number of fields input is 6 The contents are: 456 92.300003 y n Wide characters Requirements OS Versions: Windows CE 2.0 and later. Header: stdlib.h. Link Library: coredll.dll.  格式化参数规格： Format Specification Fields: scanf and wscanf FunctionsSee Also scanf Width Specification  A format specification has the following form:  % [width] [{h | l | I64 | L}]type  The format argument specifies the interpretation of the input and can contain one or more of the following:   White-space characters: blank (' '); tab ('\t'); or newline ('\n').  A white-space character causes scanf to read, but not store, all consecutive white-space characters in the input up to the next non–white-space character.   One white-space character in the format matches any number (including 0) and combination of white-space characters in the input.   Non–white-space characters, except for the percent sign (%).  A non–white-space character causes scanf to read, but not store, a matching non–white-space character.   If the next character in stdin does not match, scanf terminates.   Format specifications, introduced by the percent sign (%).  A format specification causes scanf to read and convert characters in the input into values of a specified type. The value is assigned to an argument in the argument list.   The format is read from left to right.   Characters outside format specifications are expected to match the sequence of characters in stdin; the matching characters in stdin are scanned but not stored. If a character in stdin conflicts with the format specification, scanf terminates, and the character is left in stdin as if it had not been read.  When the first format specification is encountered, the value of the first input field is converted according to this specification and stored in the location that is specified by the first argument.   The second format specification causes the second input field to be converted and stored in the second argument, and so on through the end of the format string.  An input field is defined as all characters up to the first white-space character (space, tab, or newline), or up to the first character that cannot be converted according to the format specification, or until the field width (if specified) is reached.   If there are too many arguments for the given specifications, the extra arguments are evaluated but ignored.   The results are unpredictable if there are not enough arguments for the format specification.  Each field of the format specification is a single character or a number signifying a particular format option.   The type character, which appears after the last optional format field, determines whether the input field is interpreted as a character, a string, or a number.   The simplest format specification contains only the percent sign (%) and a type character (for example, %s).   If a percent sign is followed by a character that has no meaning as a format-control character, that character and the following characters (up to the next percent sign) are treated as an ordinary sequence of characters, that is, a sequence of characters that must match the input.   For example, to specify that a percent-sign character is to be input, use %%.  An asterisk (*) following the percent sign suppresses assignment of the next input field, which is interpreted as a field of the specified type. The field is scanned but not stored.  以上信息来自MSDN，供参考。

user: user-0
content: 引用 8 楼 zhao4zhong1 的回复:武林至尊，宝刀屠龙，号令天下，莫敢不从： [quote=引用 7 楼 zhao4zhong1 的回复:] #include <stdio.h> #include <string.h> char string[80]; char seps1[3]; char seps2[3]; char *token; char *zzstrtok (     char *string,     const char *control1,//连续出现时视为中间夹空token     const char *control2 //连续出现时视为中间无空token     ) {     unsigned char *str;     const unsigned char *ctrl1 = control1;     const unsigned char *ctrl2 = control2;     unsigned char map1[32],map2[32];     static char *nextoken;     static char flag=0;     unsigned char c;     int L;      memset(map1,0,32);     memset(map2,0,32);     do {         map1[*ctrl1 >> 3] |= (1 << (*ctrl1 & 7));     } while (*ctrl1++);     do {         map2[*ctrl2 >> 3] |= (1 << (*ctrl2 & 7));     } while (*ctrl2++);      if (string) {         if (control2[0]) {             L=strlen(string);             while (1) {                 c=string[L-1];                 if (map2[c >> 3] & (1 << (c & 7))) {                     L--;                     string[L]=0;                 } else break;             }         }         if (control1[0]) {             L=strlen(string);             c=string[L-1];             if (map1[c >> 3] & (1 << (c & 7))) {                 string[L]=control1[0];                 string[L+1]=0;             }         }         str=string;     }     else        str=nextoken;      string=str;     while (1) {         if (0==flag) {             if (!*str) break;             if (map1[*str >> 3] & (1 << (*str & 7))) {                 *str=0;                 str++;                 break;             } else if (map2[*str >> 3] & (1 << (*str & 7))) {                 string++;                 str++;             } else {                 flag=1;                 str++;             }         } else if (1==flag) {             if (!*str) break;             if (map1[*str >> 3] & (1 << (*str & 7))) {                 *str=0;                 str++;                 flag=0;                 break;             } else if (map2[*str >> 3] & (1 << (*str & 7))) {                 *str=0;                 str++;                 flag=2;                 break;             } else str++;         } else {//2==flag             if (!*str) return NULL;             if (map1[*str >> 3] & (1 << (*str & 7))) {                 str++;                 string=str;                 flag=0;             } else if (map2[*str >> 3] & (1 << (*str & 7))) {                 str++;                 string=str;             } else {                 string=str;                 str++;                 flag=1;             }         }     }     nextoken=str;      if (string==str) return NULL;     else             return string; } void main() {    strcpy(string,"A \tstring\t\tof ,,tokens\n\nand some  more tokens, ");    strcpy(seps1,",\n");strcpy(seps2," \t");    printf("\n[%s]\nTokens:\n",string);    token=zzstrtok(string,seps1,seps2);    while (token!=NULL) {       printf(" <%s>",token);       token=zzstrtok(NULL,seps1,seps2);    }     strcpy(string,"1234| LIYI|China | 010 |201110260000|OK");    strcpy(seps1,"|");strcpy(seps2," ");    printf("\n[%s]\nTokens:\n",string);    token=zzstrtok(string,seps1,seps2);    while (token!=NULL) {       printf(" <%s>",token);       token=zzstrtok(NULL,seps1,seps2);    }     strcpy(string,"1234|LIYI||010|201110260000|OK");    strcpy(seps1,"");strcpy(seps2,"|");    printf("\n[%s]\nTokens:\n",string);    token=zzstrtok(string,seps1,seps2);    while (token!=NULL) {       printf(" <%s>",token);       token=zzstrtok(NULL,seps1,seps2);    }     strcpy(string,"1234|LIYI||010|201110260000|OK");    strcpy(seps1,"|");strcpy(seps2,"");    printf("\n[%s]\nTokens:\n",string);    token=zzstrtok(string,seps1,seps2);    while (token!=NULL) {       printf(" <%s>",token);       token=zzstrtok(NULL,seps1,seps2);    }     strcpy(string,"a");    strcpy(seps1,",");strcpy(seps2,"");    printf("\n[%s]\nTokens:\n",string);    token=zzstrtok(string,seps1,seps2);    while (token!=NULL) {       printf(" <%s>",token);       token=zzstrtok(NULL,seps1,seps2);    }     strcpy(string,"a,b");    strcpy(seps1,",");strcpy(seps2,"");    printf("\n[%s]\nTokens:\n",string);    token=zzstrtok(string,seps1,seps2);    while (token!=NULL) {       printf(" <%s>",token);       token=zzstrtok(NULL,seps1,seps2);    }     strcpy(string,"a,,b");    strcpy(seps1,",");strcpy(seps2,"");    printf("\n[%s]\nTokens:\n",string);    token=zzstrtok(string,seps1,seps2);    while (token!=NULL) {       printf(" <%s>",token);       token=zzstrtok(NULL,seps1,seps2);    }     strcpy(string,",a");    strcpy(seps1,",");strcpy(seps2,"");    printf("\n[%s]\nTokens:\n",string);    token=zzstrtok(string,seps1,seps2);    while (token!=NULL) {       printf(" <%s>",token);       token=zzstrtok(NULL,seps1,seps2);    }     strcpy(string,"a,");    strcpy(seps1,",");strcpy(seps2,"");    printf("\n[%s]\nTokens:\n",string);    token=zzstrtok(string,seps1,seps2);    while (token!=NULL) {       printf(" <%s>",token);       token=zzstrtok(NULL,seps1,seps2);    }     strcpy(string,",a,,b");    strcpy(seps1,",");strcpy(seps2,"");    printf("\n[%s]\nTokens:\n",string);    token=zzstrtok(string,seps1,seps2);    while (token!=NULL) {       printf(" <%s>",token);       token=zzstrtok(NULL,seps1,seps2);    }     strcpy(string,",,a,,b,,");    strcpy(seps1,",");strcpy(seps2,"");    printf("\n[%s]\nTokens:\n",string);    token=zzstrtok(string,seps1,seps2);    while (token!=NULL) {       printf(" <%s>",token);       token=zzstrtok(NULL,seps1,seps2);    }     strcpy(string,",");    strcpy(seps1,",");strcpy(seps2,"");    printf("\n[%s]\nTokens:\n",string);    token=zzstrtok(string,seps1,seps2);    while (token!=NULL) {       printf(" <%s>",token);       token=zzstrtok(NULL,seps1,seps2);    }     strcpy(string,",,");    strcpy(seps1,",");strcpy(seps2,"");    printf("\n[%s]\nTokens:\n",string);    token=zzstrtok(string,seps1,seps2);    while (token!=NULL) {       printf(" <%s>",token);       token=zzstrtok(NULL,seps1,seps2);    }     strcpy(string,",,,");    strcpy(seps1,",");strcpy(seps2," ");    printf("\n[%s]\nTokens:\n",string);    token=zzstrtok(string,seps1,seps2);    while (token!=NULL) {       printf(" <%s>",token);       token=zzstrtok(NULL,seps1,seps2);    } } // //[A      string          of ,,tokens // //and some  more tokens,] //Tokens: // <A>, <string>, <of>, <>, <tokens>, <>, <and>, <some>, <more>, <tokens>, <>, //[1234| LIYI|China | 010 |201110260000|OK] //Tokens: // <1234>, <LIYI>, <China>, <010>, <201110260000>, <OK>, //[1234|LIYI||010|201110260000|OK] //Tokens: // <1234>, <LIYI>, <010>, <201110260000>, <OK>, //[1234|LIYI||010|201110260000|OK] //Tokens: // <1234>, <LIYI>, <>, <010>, <201110260000>, <OK>, //[a] //Tokens: // <a>, //[a,b] //Tokens: // <a>, <b>, //[a,,b] //Tokens: // <a>, <>, <b>, //[,a] //Tokens: // <>, <a>, //[a,] //Tokens: // <a>, <>, //[,a,,b] //Tokens: // <>, <a>, <>, <b>, //[,,a,,b,,] //Tokens: // <>, <>, <a>, <>, <b>, <>, <>, //[,] //Tokens: // <>, <>, //[,,] //Tokens: // <>, <>, <>, //[,,,] //Tokens: // <>, <>, <>, <>,   倚天不出，谁与争锋： C++ String Toolkit (StrTk) Tokenizer http://www.codeproject.com/Articles/23198/C-String-Toolkit-StrTk-Tokenizer [/quote]  赵老师这是表示啥？ 倚天屠龙都来了？ 我表示害怕……

user: user-2
content: 武林至尊，宝刀屠龙，号令天下，莫敢不从： 引用 7 楼 zhao4zhong1 的回复:#include <stdio.h> #include <string.h> char string[80]; char seps1[3]; char seps2[3]; char *token; char *zzstrtok (     char *string,     const char *control1,//连续出现时视为中间夹空token     const char *control2 //连续出现时视为中间无空token     ) {     unsigned char *str;     const unsigned char *ctrl1 = control1;     const unsigned char *ctrl2 = control2;     unsigned char map1[32],map2[32];     static char *nextoken;     static char flag=0;     unsigned char c;     int L;      memset(map1,0,32);     memset(map2,0,32);     do {         map1[*ctrl1 >> 3] |= (1 << (*ctrl1 & 7));     } while (*ctrl1++);     do {         map2[*ctrl2 >> 3] |= (1 << (*ctrl2 & 7));     } while (*ctrl2++);      if (string) {         if (control2[0]) {             L=strlen(string);             while (1) {                 c=string[L-1];                 if (map2[c >> 3] & (1 << (c & 7))) {                     L--;                     string[L]=0;                 } else break;             }         }         if (control1[0]) {             L=strlen(string);             c=string[L-1];             if (map1[c >> 3] & (1 << (c & 7))) {                 string[L]=control1[0];                 string[L+1]=0;             }         }         str=string;     }     else        str=nextoken;      string=str;     while (1) {         if (0==flag) {             if (!*str) break;             if (map1[*str >> 3] & (1 << (*str & 7))) {                 *str=0;                 str++;                 break;             } else if (map2[*str >> 3] & (1 << (*str & 7))) {                 string++;                 str++;             } else {                 flag=1;                 str++;             }         } else if (1==flag) {             if (!*str) break;             if (map1[*str >> 3] & (1 << (*str & 7))) {                 *str=0;                 str++;                 flag=0;                 break;             } else if (map2[*str >> 3] & (1 << (*str & 7))) {                 *str=0;                 str++;                 flag=2;                 break;             } else str++;         } else {//2==flag             if (!*str) return NULL;             if (map1[*str >> 3] & (1 << (*str & 7))) {                 str++;                 string=str;                 flag=0;             } else if (map2[*str >> 3] & (1 << (*str & 7))) {                 str++;                 string=str;             } else {                 string=str;                 str++;                 flag=1;             }         }     }     nextoken=str;      if (string==str) return NULL;     else             return string; } void main() {    strcpy(string,"A \tstring\t\tof ,,tokens\n\nand some  more tokens, ");    strcpy(seps1,",\n");strcpy(seps2," \t");    printf("\n[%s]\nTokens:\n",string);    token=zzstrtok(string,seps1,seps2);    while (token!=NULL) {       printf(" <%s>",token);       token=zzstrtok(NULL,seps1,seps2);    }     strcpy(string,"1234| LIYI|China | 010 |201110260000|OK");    strcpy(seps1,"|");strcpy(seps2," ");    printf("\n[%s]\nTokens:\n",string);    token=zzstrtok(string,seps1,seps2);    while (token!=NULL) {       printf(" <%s>",token);       token=zzstrtok(NULL,seps1,seps2);    }     strcpy(string,"1234|LIYI||010|201110260000|OK");    strcpy(seps1,"");strcpy(seps2,"|");    printf("\n[%s]\nTokens:\n",string);    token=zzstrtok(string,seps1,seps2);    while (token!=NULL) {       printf(" <%s>",token);       token=zzstrtok(NULL,seps1,seps2);    }     strcpy(string,"1234|LIYI||010|201110260000|OK");    strcpy(seps1,"|");strcpy(seps2,"");    printf("\n[%s]\nTokens:\n",string);    token=zzstrtok(string,seps1,seps2);    while (token!=NULL) {       printf(" <%s>",token);       token=zzstrtok(NULL,seps1,seps2);    }     strcpy(string,"a");    strcpy(seps1,",");strcpy(seps2,"");    printf("\n[%s]\nTokens:\n",string);    token=zzstrtok(string,seps1,seps2);    while (token!=NULL) {       printf(" <%s>",token);       token=zzstrtok(NULL,seps1,seps2);    }     strcpy(string,"a,b");    strcpy(seps1,",");strcpy(seps2,"");    printf("\n[%s]\nTokens:\n",string);    token=zzstrtok(string,seps1,seps2);    while (token!=NULL) {       printf(" <%s>",token);       token=zzstrtok(NULL,seps1,seps2);    }     strcpy(string,"a,,b");    strcpy(seps1,",");strcpy(seps2,"");    printf("\n[%s]\nTokens:\n",string);    token=zzstrtok(string,seps1,seps2);    while (token!=NULL) {       printf(" <%s>",token);       token=zzstrtok(NULL,seps1,seps2);    }     strcpy(string,",a");    strcpy(seps1,",");strcpy(seps2,"");    printf("\n[%s]\nTokens:\n",string);    token=zzstrtok(string,seps1,seps2);    while (token!=NULL) {       printf(" <%s>",token);       token=zzstrtok(NULL,seps1,seps2);    }     strcpy(string,"a,");    strcpy(seps1,",");strcpy(seps2,"");    printf("\n[%s]\nTokens:\n",string);    token=zzstrtok(string,seps1,seps2);    while (token!=NULL) {       printf(" <%s>",token);       token=zzstrtok(NULL,seps1,seps2);    }     strcpy(string,",a,,b");    strcpy(seps1,",");strcpy(seps2,"");    printf("\n[%s]\nTokens:\n",string);    token=zzstrtok(string,seps1,seps2);    while (token!=NULL) {       printf(" <%s>",token);       token=zzstrtok(NULL,seps1,seps2);    }     strcpy(string,",,a,,b,,");    strcpy(seps1,",");strcpy(seps2,"");    printf("\n[%s]\nTokens:\n",string);    token=zzstrtok(string,seps1,seps2);    while (token!=NULL) {       printf(" <%s>",token);       token=zzstrtok(NULL,seps1,seps2);    }     strcpy(string,",");    strcpy(seps1,",");strcpy(seps2,"");    printf("\n[%s]\nTokens:\n",string);    token=zzstrtok(string,seps1,seps2);    while (token!=NULL) {       printf(" <%s>",token);       token=zzstrtok(NULL,seps1,seps2);    }     strcpy(string,",,");    strcpy(seps1,",");strcpy(seps2,"");    printf("\n[%s]\nTokens:\n",string);    token=zzstrtok(string,seps1,seps2);    while (token!=NULL) {       printf(" <%s>",token);       token=zzstrtok(NULL,seps1,seps2);    }     strcpy(string,",,,");    strcpy(seps1,",");strcpy(seps2," ");    printf("\n[%s]\nTokens:\n",string);    token=zzstrtok(string,seps1,seps2);    while (token!=NULL) {       printf(" <%s>",token);       token=zzstrtok(NULL,seps1,seps2);    } } // //[A      string          of ,,tokens // //and some  more tokens,] //Tokens: // <A>, <string>, <of>, <>, <tokens>, <>, <and>, <some>, <more>, <tokens>, <>, //[1234| LIYI|China | 010 |201110260000|OK] //Tokens: // <1234>, <LIYI>, <China>, <010>, <201110260000>, <OK>, //[1234|LIYI||010|201110260000|OK] //Tokens: // <1234>, <LIYI>, <010>, <201110260000>, <OK>, //[1234|LIYI||010|201110260000|OK] //Tokens: // <1234>, <LIYI>, <>, <010>, <201110260000>, <OK>, //[a] //Tokens: // <a>, //[a,b] //Tokens: // <a>, <b>, //[a,,b] //Tokens: // <a>, <>, <b>, //[,a] //Tokens: // <>, <a>, //[a,] //Tokens: // <a>, <>, //[,a,,b] //Tokens: // <>, <a>, <>, <b>, //[,,a,,b,,] //Tokens: // <>, <>, <a>, <>, <b>, <>, <>, //[,] //Tokens: // <>, <>, //[,,] //Tokens: // <>, <>, <>, //[,,,] //Tokens: // <>, <>, <>, <>,   倚天不出，谁与争锋： C++ String Toolkit (StrTk) Tokenizer http://www.codeproject.com/Articles/23198/C-String-Toolkit-StrTk-Tokenizer

user: user-2
content: #include <stdio.h> #include <string.h> char string[80]; char seps1[3]; char seps2[3]; char *token; char *zzstrtok (     char *string,     const char *control1,//连续出现时视为中间夹空token     const char *control2 //连续出现时视为中间无空token     ) {     unsigned char *str;     const unsigned char *ctrl1 = control1;     const unsigned char *ctrl2 = control2;     unsigned char map1[32],map2[32];     static char *nextoken;     static char flag=0;     unsigned char c;     int L;      memset(map1,0,32);     memset(map2,0,32);     do {         map1[*ctrl1 >> 3] |= (1 << (*ctrl1 & 7));     } while (*ctrl1++);     do {         map2[*ctrl2 >> 3] |= (1 << (*ctrl2 & 7));     } while (*ctrl2++);      if (string) {         if (control2[0]) {             L=strlen(string);             while (1) {                 c=string[L-1];                 if (map2[c >> 3] & (1 << (c & 7))) {                     L--;                     string[L]=0;                 } else break;             }         }         if (control1[0]) {             L=strlen(string);             c=string[L-1];             if (map1[c >> 3] & (1 << (c & 7))) {                 string[L]=control1[0];                 string[L+1]=0;             }         }         str=string;     }     else        str=nextoken;      string=str;     while (1) {         if (0==flag) {             if (!*str) break;             if (map1[*str >> 3] & (1 << (*str & 7))) {                 *str=0;                 str++;                 break;             } else if (map2[*str >> 3] & (1 << (*str & 7))) {                 string++;                 str++;             } else {                 flag=1;                 str++;             }         } else if (1==flag) {             if (!*str) break;             if (map1[*str >> 3] & (1 << (*str & 7))) {                 *str=0;                 str++;                 flag=0;                 break;             } else if (map2[*str >> 3] & (1 << (*str & 7))) {                 *str=0;                 str++;                 flag=2;                 break;             } else str++;         } else {//2==flag             if (!*str) return NULL;             if (map1[*str >> 3] & (1 << (*str & 7))) {                 str++;                 string=str;                 flag=0;             } else if (map2[*str >> 3] & (1 << (*str & 7))) {                 str++;                 string=str;             } else {                 string=str;                 str++;                 flag=1;             }         }     }     nextoken=str;      if (string==str) return NULL;     else             return string; } void main() {    strcpy(string,"A \tstring\t\tof ,,tokens\n\nand some  more tokens, ");    strcpy(seps1,",\n");strcpy(seps2," \t");    printf("\n[%s]\nTokens:\n",string);    token=zzstrtok(string,seps1,seps2);    while (token!=NULL) {       printf(" <%s>",token);       token=zzstrtok(NULL,seps1,seps2);    }     strcpy(string,"1234| LIYI|China | 010 |201110260000|OK");    strcpy(seps1,"|");strcpy(seps2," ");    printf("\n[%s]\nTokens:\n",string);    token=zzstrtok(string,seps1,seps2);    while (token!=NULL) {       printf(" <%s>",token);       token=zzstrtok(NULL,seps1,seps2);    }     strcpy(string,"1234|LIYI||010|201110260000|OK");    strcpy(seps1,"");strcpy(seps2,"|");    printf("\n[%s]\nTokens:\n",string);    token=zzstrtok(string,seps1,seps2);    while (token!=NULL) {       printf(" <%s>",token);       token=zzstrtok(NULL,seps1,seps2);    }     strcpy(string,"1234|LIYI||010|201110260000|OK");    strcpy(seps1,"|");strcpy(seps2,"");    printf("\n[%s]\nTokens:\n",string);    token=zzstrtok(string,seps1,seps2);    while (token!=NULL) {       printf(" <%s>",token);       token=zzstrtok(NULL,seps1,seps2);    }     strcpy(string,"a");    strcpy(seps1,",");strcpy(seps2,"");    printf("\n[%s]\nTokens:\n",string);    token=zzstrtok(string,seps1,seps2);    while (token!=NULL) {       printf(" <%s>",token);       token=zzstrtok(NULL,seps1,seps2);    }     strcpy(string,"a,b");    strcpy(seps1,",");strcpy(seps2,"");    printf("\n[%s]\nTokens:\n",string);    token=zzstrtok(string,seps1,seps2);    while (token!=NULL) {       printf(" <%s>",token);       token=zzstrtok(NULL,seps1,seps2);    }     strcpy(string,"a,,b");    strcpy(seps1,",");strcpy(seps2,"");    printf("\n[%s]\nTokens:\n",string);    token=zzstrtok(string,seps1,seps2);    while (token!=NULL) {       printf(" <%s>",token);       token=zzstrtok(NULL,seps1,seps2);    }     strcpy(string,",a");    strcpy(seps1,",");strcpy(seps2,"");    printf("\n[%s]\nTokens:\n",string);    token=zzstrtok(string,seps1,seps2);    while (token!=NULL) {       printf(" <%s>",token);       token=zzstrtok(NULL,seps1,seps2);    }     strcpy(string,"a,");    strcpy(seps1,",");strcpy(seps2,"");    printf("\n[%s]\nTokens:\n",string);    token=zzstrtok(string,seps1,seps2);    while (token!=NULL) {       printf(" <%s>",token);       token=zzstrtok(NULL,seps1,seps2);    }     strcpy(string,",a,,b");    strcpy(seps1,",");strcpy(seps2,"");    printf("\n[%s]\nTokens:\n",string);    token=zzstrtok(string,seps1,seps2);    while (token!=NULL) {       printf(" <%s>",token);       token=zzstrtok(NULL,seps1,seps2);    }     strcpy(string,",,a,,b,,");    strcpy(seps1,",");strcpy(seps2,"");    printf("\n[%s]\nTokens:\n",string);    token=zzstrtok(string,seps1,seps2);    while (token!=NULL) {       printf(" <%s>",token);       token=zzstrtok(NULL,seps1,seps2);    }     strcpy(string,",");    strcpy(seps1,",");strcpy(seps2,"");    printf("\n[%s]\nTokens:\n",string);    token=zzstrtok(string,seps1,seps2);    while (token!=NULL) {       printf(" <%s>",token);       token=zzstrtok(NULL,seps1,seps2);    }     strcpy(string,",,");    strcpy(seps1,",");strcpy(seps2,"");    printf("\n[%s]\nTokens:\n",string);    token=zzstrtok(string,seps1,seps2);    while (token!=NULL) {       printf(" <%s>",token);       token=zzstrtok(NULL,seps1,seps2);    }     strcpy(string,",,,");    strcpy(seps1,",");strcpy(seps2," ");    printf("\n[%s]\nTokens:\n",string);    token=zzstrtok(string,seps1,seps2);    while (token!=NULL) {       printf(" <%s>",token);       token=zzstrtok(NULL,seps1,seps2);    } } // //[A      string          of ,,tokens // //and some  more tokens,] //Tokens: // <A>, <string>, <of>, <>, <tokens>, <>, <and>, <some>, <more>, <tokens>, <>, //[1234| LIYI|China | 010 |201110260000|OK] //Tokens: // <1234>, <LIYI>, <China>, <010>, <201110260000>, <OK>, //[1234|LIYI||010|201110260000|OK] //Tokens: // <1234>, <LIYI>, <010>, <201110260000>, <OK>, //[1234|LIYI||010|201110260000|OK] //Tokens: // <1234>, <LIYI>, <>, <010>, <201110260000>, <OK>, //[a] //Tokens: // <a>, //[a,b] //Tokens: // <a>, <b>, //[a,,b] //Tokens: // <a>, <>, <b>, //[,a] //Tokens: // <>, <a>, //[a,] //Tokens: // <a>, <>, //[,a,,b] //Tokens: // <>, <a>, <>, <b>, //[,,a,,b,,] //Tokens: // <>, <>, <a>, <>, <b>, <>, <>, //[,] //Tokens: // <>, <>, //[,,] //Tokens: // <>, <>, <>, //[,,,] //Tokens: // <>, <>, <>, <>,

user: user-0
content: 引用 3 楼 buyong 的回复:1. 找sscanf的源代码，就知道为什么没有解析了 2. 用正则表达式  sscanf支持的是一些简单的正则表达式。按理，我给的“#%[^#]#%[^#]#”应该符合正则啊，没有匹配到，那么对应的buffer里面应该是NULL，而实际却影响到后面一个buffer的赋值了。 正在VC9里面调试，研究源码中。

user: user-0
content: 引用 1 楼 N_sev7 的回复:哪来的scanf啊  明明是sscanf 你跟到sscanf函数中，看这个函数怎么处理的，自己重新写一个解析的函数也不难吧  调试跟踪进去了，不是汇编。VC9调试，正在研究中。

user: user-3
content: 1. 找sscanf的源代码，就知道为什么没有解析了 2. 用正则表达式

user: user-0
content: 引用 1 楼 N_sev7 的回复:哪来的scanf啊  明明是sscanf 你跟到sscanf函数中，看这个函数怎么处理的，自己重新写一个解析的函数也不难吧  在跟进去就是汇编了，不懂。 自己写一个函数，就不会去写sscanf函数了，而是直接写个专门用于接卸这段字符串的函数。 现在就是要研究为什么这个sscanf函数没有实现我想要的结果。

user: user-4
content: 哪来的scanf啊  明明是sscanf 你跟到sscanf函数中，看这个函数怎么处理的，自己重新写一个解析的函数也不难吧