0_0_21819708_6013.cpp:20:11: error: 'edge' was not declared in this scope
bool cmp2(edge a,edge b)
^
0_0_21819708_6013.cpp:20:18: error: 'edge' was not declared in this scope
bool cmp2(edge a,edge b)
^
0_0_21819708_6013.cpp:20:24: error: expression list treated as compound expression in initializer [-fpermissive]
bool cmp2(edge a,edge b)
^
0_0_21819708_6013.cpp:21:1: error: expected ',' or ';' before '{' token
{
^
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