C++ STL count() number of substring occurences...

nyk · 06-24-2004, 03:26 AM

I want to use the STL function

Code:

occur=string.count(string2,0)

to find out how many times the (shorter) string string2 occurs in string. I found the count function in an STL tutorial, but the compiler says: `count' undeclared!
Is there an other name for this function that can be used with the GNU C++ ?
or are there some special includes needed? I already have these:

Code:

#include <iostream>
#include <map>
#include <string>

dakensta · 06-24-2004, 04:40 AM

nyk · 06-25-2004, 04:32 AM

thanx!
I already tried #include <algorithm> but z=k.count(ik) still doesnt work... (z=int, k,ik=string)
Still produces the error: `count' undeclared.

Now I just use this code to count the stuff myself:

Code:

z=ik.find(k);o=0;
while (z!=-1) {z=ik.find(k,z+k.size());o++;}

then the int o has the number of occurences... a bit more complicated, but it works...

dakensta · 06-25-2004, 05:53 AM

Oops - my fault. string doesn't have a member function count.
I thought you were talking about std::count and didn't read your post thoroughly.

A good STL reference can be found http://www.sgi.com/tech/stl/stl_index_cat.html

Or I recommend this book http://www.josuttis.com/libbook/

nyk · 06-25-2004, 07:12 AM

thanks again, a good refererence sure will be usefull!