foo.cc:3:9: error: expected unqualified-id before 'int'
 int n,k,int cnt=0;
         ^~~
foo.cc: In function 'int main()':
foo.cc:12:4: error: 'cnt' was not declared in this scope
    cnt++;
    ^~~
foo.cc:12:4: note: suggested alternative: 'int'
    cnt++;
    ^~~
    int
foo.cc:18:17: error: 'cnt' was not declared in this scope
    cout<<"OK "<<cnt;
                 ^~~
foo.cc:18:17: note: suggested alternative: 'int'
    cout<<"OK "<<cnt;
                 ^~~
                 int

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