Hi thanks,
I tried earlier with one add_vertex only. Thats why I got the error.
Now its fine. I will try reading that tutorial and understand
better....
Thanks
suresh
On Tue, Dec 15, 2009 at 3:18 PM, Tobias Columbus
Hi again,
Try the following code, which just compiles fine with g++ 4.4.1 on my system:
struct City{...}; struct Highway{...};
typedef ... Map;
int main(){ Map map; Map::vertex_descriptor v = add_vertex( map ); Map::vertex_descriptor u = add_vertex( map ); map[v].name = "Troy"; map[v].population = 49170; map[v].zipcodes.push_back(12180); Map::edge_descriptor e = add_edge( u, v, map ).first; map[e].name = "I-87"; map[e].miles = 10; map[e].speed_limit = 65; map[e].lanes = 4; map[e].divided = true; return 0; }
Generally I would suggest reading http://www.boost.org/doc/libs/1_41_0/libs/graph/doc/quick_tour.html which gives a quick overview of how to handle graphs in BGL.
If you work through this tutorial, vertex and edge properties will also get explained.
Regards Tobias
On Tuesday 15 December 2009 05:00:01 pm List User wrote:
Hi Tobias Columbus,
In fact I had tried that also. But then I got a funny message while executing like this: Ubuntu 9.04, g++ 4.3.3 //Map::vertex_descriptor v = *vertices(map).first; Map::vertex_descriptor v = add_vertex(map);
suresh@suresh-laptop:~/C++$ ./a.out *** glibc detected *** ./a.out: free(): invalid pointer: 0x09f9c064
======= Backtrace: ========= /lib/tls/i686/cmov/libc.so.6[0xb7e6a604] /lib/tls/i686/cmov/libc.so.6(cfree+0x96)[0xb7e6c5b6] /usr/lib/libstdc++.so.6(_ZdlPv+0x21)[0xb804d231] ../a.out[0x8049e7d] ../a.out[0x8049ea7] .. .. ..
so what to do next?
suresh
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