View Compilation Error

0_0_23052514_7649.cpp: In function 'void dfs(int, int, int)':
0_0_23052514_7649.cpp:22:28: error: 'vis' was not declared in this scope
   if(a[tempx][tempy]!='X'&&vis[tempx][tempy]!=1){
                            ^
0_0_23052514_7649.cpp: In function 'int main()':
0_0_23052514_7649.cpp:32:10: error: 'vis' was not declared in this scope
   memset(vis,0,sizeof(vis));
          ^