foo.cc: In function 'int main()':
foo.cc:11:4: error: 'put' was not declared in this scope
    put(tmp);
    ^~~
foo.cc:11:4: note: suggested alternative: 'putw'
    put(tmp);
    ^~~
    putw
foo.cc:13:3: error: 'sum' was not declared in this scope
   sum=0;
   ^~~
foo.cc:18:4: error: 'put' was not declared in this scope
    put(a+b);
    ^~~
foo.cc:18:4: note: suggested alternative: 'putw'
    put(a+b);
    ^~~
    putw
foo.cc:5:7: warning: unused variable 'l' [-Wunused-variable]
   int l=0,n;
       ^

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