View Compilation Error

0_0_17429850_29508.cpp: In function 'void add()':
0_0_17429850_29508.cpp:12:11: error: 'tot' was not declared in this scope
  cout<<(++tot)<<endl;
           ^
0_0_17429850_29508.cpp: In function 'void find()':
0_0_17429850_29508.cpp:22:3: error: 'tot' was not declared in this scope
   tot--;
   ^