View Compilation Error

0_0_33823559_21050.cpp: In function 'int main()':
0_0_33823559_21050.cpp:30:5: error: 'flag' was not declared in this scope
     flag=false;
     ^
0_0_33823559_21050.cpp:35:6: error: 'flag' was not declared in this scope
   if(flag)cout<<"Case #"<<l<<": "<<day<<endl;
      ^