View Compilation Error

41538_0_15151.cpp: In function `void dfs(int)':
41538_0_15151.cpp:17: error: `count' undeclared (first use this function)
41538_0_15151.cpp:17: error: (Each undeclared identifier is reported only once for each function it appears in.)
41538_0_15151.cpp: In function `int main()':
41538_0_15151.cpp:30: error: `count' undeclared (first use this function)