View Compilation Error

0_0_7241404_9796.cpp: In member function `void network::build(int)':
0_0_7241404_9796.cpp:81: error: `g' undeclared (first use this function)
0_0_7241404_9796.cpp:81: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_7241404_9796.cpp: At global scope:
0_0_7241404_9796.cpp:83: error: `network g' used prior to declaration