View Compilation Error

0_0_22436169_12829.cpp: In function 'void dfs(int, int, int, int)':
0_0_22436169_12829.cpp:67:51: error: 'vis' was not declared in this scope
                      if(x1<0||x1>=5||y1<0||y1>=5||vis[x1][y1])
                                                   ^
0_0_22436169_12829.cpp: In function 'int main()':
0_0_22436169_12829.cpp:100:34: error: 'vis' was not declared in this scope
                           memset(vis,0,sizeof(vis));
                                  ^