string fun_1

strtok()

Syntax:

#include 
char *strtok( char *str1, const char *str2 );

Description:
The strtok() function returns a pointer to the next "token" in str1, where str2 contains the delimiters that determine the token. strtok() returns NULL if no token is found. In order to convert a string to tokens, the first call to strtok() should have str1 point to the string to be tokenized. All calls after this should have str1 be NULL.

Example:

char str[] = "now # is the time for all # good men to come to the # aid of their country";
char delims[] = "#";
char *result = NULL;
result = strtok( str, delims );
while( result != NULL ) {
   printf( "result is \"%s\"\n", result );
   result = strtok( NULL, delims );
}

OUTPUT:
 result is "now "
 result is " is the time for all "
 result is " good men to come to the "
 result is " aid of their country"

2:

strchr()

Syntax:
#include char *strchr( const char *str, int ch );

Description:
The function strchr() returns a pointer to the first occurence of ch in str, or NULL if ch is not found.

3:
Syntax:

#include 
char *strrchr( const char *str, int ch );

Description:
The function strrchr() returns a pointer to the last occurrence of ch in str, or NULL if no match is found.

4:Syntax:

#include 
char *strstr( const char *str1, const char *str2 );

Description:
The function strstr() returns a pointer to the first occurrence of str2 in str1, or NULL if no match is found.

5:
Syntax:

#include 
char *strpbrk( const char *str1, const char *str2 );

Description:
The function strpbrk() returns a pointer to the first ocurrence in str1 of any character in str2, or NULL if none are present.

6: