View Compilation Error

0_0_2094808_1722.cpp:10: error: expected unqualified-id before "char"
0_0_2094808_1722.cpp:10: error: expected `,' or `;' before "char"
0_0_2094808_1722.cpp: In function `bool dfs(int)':
0_0_2094808_1722.cpp:16: error: `bo' undeclared (first use this function)
0_0_2094808_1722.cpp:16: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_2094808_1722.cpp: In function `int main()':
0_0_2094808_1722.cpp:54: error: `bo' undeclared (first use this function)