formatting a string

[vin0_oce]

if i have a string, how can i get a substring from it and store it in a new variable?

eg

char str[100]

and i want substring1 from character 20~30 and substring2 35-41
strncp can not specify the starting position, can not use strtok because there is no particular delimiter.
is there a easy way to do it in C?

please help me

[The Junglist]

If you alway know the indexes of the substring that you want, then just write a function of your own. Here's a real sloppy way of doing it :

void function( char* buffer, int startIndex, int endIndex, char*  newBuffer)
{
     int i;

     for( i = startIndex; i < endIndex; i++ )
     {
          newBuffer[ i - startIndex] = buffer[i];
     }
}

otherwise you could look up strstr()

[vin0_oce]

Originally posted by vVv
Use strncpy() (string.h).

char buf[100] = { ... },
     sub1[16],
     sub2[8];
strncpy( sub1, &buf[20], 10 );
sub1[10] = 0;
strncpy( sub2, &buf[35], 6 );
sub2[6] = 0;

ahhhhh.........i c ........thanks man