View Compilation Error

0_0_11012577_4183.cpp:4: error: expected unqualified-id before '{' token
0_0_11012577_4183.cpp:4: error: expected `,' or `;' before '{' token
0_0_11012577_4183.cpp: In function `int main()':
0_0_11012577_4183.cpp:31: error: `DFS' undeclared (first use this function)
0_0_11012577_4183.cpp:31: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_11012577_4183.cpp:32: error: expected primary-expression before "else"
0_0_11012577_4183.cpp:32: error: expected `;' before "else"