View Compilation Error

0_0_26347482_17514.cpp: In function 'void change()':
0_0_26347482_17514.cpp:21:5: error: 'map' was not declared in this scope
  a1=map[0+dx][0+dy];
     ^
0_0_26347482_17514.cpp: In function 'int main()':
0_0_26347482_17514.cpp:46:13: error: 'map' was not declared in this scope
      memset(map,0,sizeof(map));
             ^