/in/foo.cc: In function 'int main()':
/in/foo.cc:21:3: error: 'm' was not declared in this scope
   m=m+p[i];
   ^
/in/foo.cc:21:7: error: 'p' was not declared in this scope
   m=m+p[i];
       ^
/in/foo.cc:23:8: error: 'm' was not declared in this scope
  cout<<m<<endl;
        ^