View Compilation Error

0_0_8761465_8670.cpp: In function `int topo(int)':
0_0_8761465_8670.cpp:16: error: `count' undeclared (first use this function)
0_0_8761465_8670.cpp:16: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_8761465_8670.cpp: In function `int main()':
0_0_8761465_8670.cpp:41: error: `count' undeclared (first use this function)