strsep

#include
#include
#include

int main(void)
{
char   ptr[]={ "abcdefghijklmnopqrstuvwxyz "};
char   *p,*str= "m";
p=ptr;
printf( "%s/n ",strsep(&p,str));
printf( "%s/n ",p);
str= "s";
printf( "%s/n ",strsep(&p,str));
printf( "%s/n ",p);

    return 0;
}

 

abcdefghijkl
 nopqrstuvwxyz
 nopqr
 tuvwxyz