std::string str="0,0,mirro;0,1,david";如何遍历string解析出来赋值给Gird的结构体?

[mirroatl187]

typedef struct GridStu{
int row;
int col;
string Context;
}Grid;

string str="0,0,mirro;0,1,david";俩段内容

[schlafenhamster]

sscanf() - 从一个字符串中读进与指定格式相符的数据.

[赵4老师]

仅供参考

#include <stdio.h>
char s[]="123 ab 4";
char *p;
int v,n,k;
void main() {
    p=s;
    while (1) {
        k=sscanf(p,"%d%n",&v,&n);
        printf("k,v,n=%d,%d,%d\n",k,v,n);
        if (1==k) {
            p+=n;
        } else if (0==k) {
            printf("skip char[%c]\n",p[0]);
            p++;
        } else {//EOF==k
            break;
        }
    }
    printf("End.\n");
}
//k,v,n=1,123,3
//k,v,n=0,123,3
//skip char[ ]
//k,v,n=0,123,3
//skip char[a]
//k,v,n=0,123,3
//skip char[b]
//k,v,n=1,4,2
//k,v,n=-1,4,2
//End.

或者

strtok, wcstok, _mbstok
Find the next token in a string.

char *strtok( char *strToken, const char *strDelimit );

wchar_t *wcstok( wchar_t *strToken, const wchar_t *strDelimit );

unsigned char *_mbstok( unsigned char*strToken, const unsigned char *strDelimit );

Routine Required Header Compatibility 
strtok <string.h> ANSI, Win 95, Win NT 
wcstok <string.h> or <wchar.h> ANSI, Win 95, Win NT 
_mbstok <mbstring.h> Win 95, Win NT 


For additional compatibility information, see Compatibility in the Introduction.

Libraries

LIBC.LIB Single thread static library, retail version 
LIBCMT.LIB Multithread static library, retail version 
MSVCRT.LIB Import library for MSVCRT.DLL, retail version 


Return Value

All of these functions return a pointer to the next token found in strToken. They return NULL when no more tokens are found. Each call modifies strToken by substituting a NULL character for each delimiter that is encountered.

Parameters

strToken

String containing token(s)

strDelimit

Set of delimiter characters

Remarks

The strtok function finds the next token in strToken. The set of characters in strDelimit specifies possible delimiters of the token to be found in strToken on the current call. wcstok and _mbstok are wide-character and multibyte-character versions of strtok. The arguments and return value of wcstok are wide-character strings; those of _mbstok are multibyte-character strings. These three functions behave identically otherwise.

Generic-Text Routine Mappings

TCHAR.H Routine  _UNICODE & _MBCS Not Defined _MBCS Defined _UNICODE Defined 
_tcstok strtok  _mbstok  wcstok  


On the first call to strtok, the function skips leading delimiters and returns a pointer to the first token in strToken, terminating the token with a null character. More tokens can be broken out of the remainder of strToken by a series of calls to strtok. Each call to strtok modifies strToken by inserting a null character after the token returned by that call. To read the next token from strToken, call strtok with a NULL value for the strToken argument. The NULL strToken argument causes strtok to search for the next token in the modified strToken. The strDelimit argument can take any value from one call to the next so that the set of delimiters may vary.

Warning   Each of these functions uses a static variable for parsing the string into tokens. If multiple or simultaneous calls are made to the same function, a high potential for data corruption and inaccurate results exists. Therefore, do not attempt to call the same function simultaneously for different strings and be aware of calling one of these function from within a loop where another routine may be called that uses the same function.  However, calling this function simultaneously from multiple threads does not have undesirable effects.

Example

/* STRTOK.C: In this program, a loop uses strtok
 * to print all the tokens (separated by commas
 * or blanks) in the string named "string".
 */

#include <string.h>
#include <stdio.h>

char string[] = "A string\tof ,,tokens\nand some  more tokens";
char seps[]   = " ,\t\n";
char *token;

void main( void )
{
   printf( "%s\n\nTokens:\n", string );
   /* Establish string and get the first token: */
   token = strtok( string, seps );
   while( token != NULL )
   {
      /* While there are tokens in "string" */
      printf( " %s\n", token );
      /* Get next token: */
      token = strtok( NULL, seps );
   }
}


Output

A string   of ,,tokens
and some  more tokens

Tokens:
 A
 string
 of
 tokens
 and
 some
 more
 tokens


String Manipulation Routines

See Also   strcspn, strspn, setlocale

[mirroatl187]

用这个stirng类函数进行读取啊。。。

引用 1 楼 schlafenhamster 的回复:

sscanf() - 从一个字符串中读进与指定格式相符的数据.

[schlafenhamster]

string 没有方便的函数,和 CSrtring 一样.