foo.cpp:1:1: error: 'include' does not name a type
 include <iostream> 
 ^
foo.cpp: In function 'int main()':
foo.cpp:8:1: error: 'cin' was not declared in this scope
 cin>>l>>m;
 ^
foo.cpp:23:1: error: 'cout' was not declared in this scope
 cout<<k<<endl;
 ^
foo.cpp:23:10: error: 'endl' was not declared in this scope
 cout<<k<<endl;
          ^