View Compilation Error

0_0_6802781_22861.cpp: In function `void dfs2(int, int)':
0_0_6802781_22861.cpp:68: error: `j' undeclared (first use this function)
0_0_6802781_22861.cpp:68: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_6802781_22861.cpp:68: error: expected `;' before ')' token