Re: conditional breakpoints in gdb (c++)

Hi,
I am having a lot of trouble setting conditional breakpoints in gdb,
here is a simple example...

#include<string>
#include<iostream>
using namespace std;

void func(string& s){
    cout << s << endl;
}

int main()
{
    string a[] ={ "A", "B", "C" };
    for (int i=0; i < 3 ; i++)
        func(a[i]);
}
~
I am trying to break at the cout (line # 6)
 in func(string&) only if s == "C", but gdb disregards it no matter
what i try to do, here it goes

(gdb) b 6 if s == "C" //does not work breaks for "A", "B", "C"
(gdb) b 6 if ( (s== "C") > 0) //breaks for all "A", "B", "C"

(gdb) b 6 if s.operator==("C") > 0
(gdb) b 6 if s.operator==(s,"C") > 0
Error in testing breakpoint condition:
There is no member or method named operator.

(gdb) b 6 if (strcmp(s.c_str() , "C") == 0 )
No symbol "strcmp" in current context.

The only way i can possibly think of is to add source lines and clean
them up later like
 if ( s == "C" ) break;
and set a breakpoint at that line!!!
There has to be a better way to do this...what am i missing here..