View Compilation Error

0_0_23357757_28969.cpp: In function 'int main()':
0_0_23357757_28969.cpp:11:4: error: 'cim' was not declared in this scope
    cim>>a;
    ^
0_0_23357757_28969.cpp:15:3: error: 'cont' was not declared in this scope
   cont<<sum<<endl;
   ^