C/C++中字符串截取的函数

用strtok函数，其函数声明为

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

在C++中应该有更好的方法，比如MFC中CString类中的成员函数SpanExcluding和SpanIncluding都能达到截取字符串的作用。

下面主要介绍strtok。strtok，SpanExcluding和SpanIncluding都可以在MSDN中找到详细的应用方法

参数

strToken   String containing token(s) 

strDelimit Set of delimiter characters 

返回值说明 

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.

例子如下：

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 
#include 

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